GYRE THERAPEUTICS, INC.

In this section, unless otherwise specified, references to “we,” “our,” “us” and “our company” refer to Gyre Therapeutics, Inc. and our majority indirectly owned subsidiary, Beijing Continent Pharmaceuticals Co., Ltd. (d/b/a Gyre Pharmaceuticals Co., Ltd.) (“Gyre Pharmaceuticals”).

Overview

We are a commercial-stage pharmaceutical company with a proven track record of financial success developing and commercializing small-molecule anti-inflammatory and anti-fibrotic drugs targeting organ diseases, focusing specifically on organ fibrosis. Fibrotic diseases represent a large patient population with significant unmet medical needs and involve complex, multi-stage processes with multiple pathways. While there are numerous potential targets for anti-fibrotic therapy, both established and emerging, addressing a single molecular pathway may not be sufficient to prevent, halt, or reverse fibrosis. Our strategy is to build on our success in the development and commercialization of ETUARY®(pirfenidone) to expand into new indications and advance our pipeline of innovative drug candidates. By leveraging clinically validated compounds, our goal is to drive a de-risked pipeline through late-stage clinical development and commercialization to provide effective treatments for patients in the United States and globally.

ETUARY (pirfenidone)

Pirfenidone, the first anti-fibrotic drug approved for idiopathic pulmonary fibrosis (“IPF”) in Japan, the European Union (“EU”), the United States, and the PRC, is a small molecule drug that inhibits the synthesis of Tumor Growth Transforming (“TGF”)-ß1, Tumor Necrosis Factor (“TNF”)-α, and other fibrosis and inflammation modulators. We successfully advanced pirfenidone from research and development (“R&D”) to commercialization in the PRC for the treatment of IPF. In 2024, ETUARY’s annual sales reached $105.0 million. In addition to IPF, pirfenidone is undergoing one additional Phase 3 trial in the PRC for the treatment of pneumoconiosis (“PD”) and was undergoing two Phase 3 trials in the PRC for the treatment of dermatomyositis-related interstitial lung disease ("DM-ILD") and sclerosis-related interstitial lung disease ("SSc-ILD") to broaden its indications and market. We are prioritizing the development of our product candidates for other targeted indications and, as a result, have paused our two Phase 3 trials in the PRC for the treatment of DM-ILD and SSc-ILD. We may decide to continue such Phase 3 trials in the future.

F351 (hydronidone)

F351 (hydronidone), our lead development candidate, is a structural derivative of ETUARY. It is a new oral chemical entity with an anti-fibrotic, TGF-ß1-targeting mechanism of action, for which we hold patents in major markets. Our Phase 2 trial of F351 in the PRC for Chronic Hepatitis B (“CHB”)-associated liver fibrosis showed that F351 was well-tolerated without notable toxicity and patients treated showed statistically-significant improvement of liver fibrosis.

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Our most significant near-term catalyst is the anticipated topline results of F351 for our ongoing Phase 3 trial in the PRC expected in the second quarter of 2025. Our confirmatory 52-week Phase 3 trial enrolled 248 patients and the last patient completed the trial in October 2024. Topline results from our Phase 3 trial will be a critical milestone in our clinical development and commercial strategy. A positive outcome has the potential to enhance our commercial sales, strengthen our market position and drive overall company growth.

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We are preparing a U.S. IND application and expect to submit it in the first half of 2025. In the United States, we have completed a Phase 1 clinical trial of F351 in healthy volunteers. Following results from the PRC Phase 3 trial in CHB-associated liver fibrosis and pending approval of our IND, we expect to initiate a Phase 2 trial to evaluate F351 for the treatment of liver fibrosis associated with MASH in 2025.

Generic Drugs

Nintedanib and avatrombopag are our two commercial-ready drugs that have planned commercial launches in the PRC in 2025. Nintedanib is approved as a standard-of-care drug for IPF, SSc-ILD, and Progressive Fibrosing Interstitial Lung Disease (“PF-ILD”). Avatrombopag has received approval for two indications, the treatment of thrombocytopenia (“TP”) associated with chronic liver disease (“CLD”) and chronic idiopathic thrombocytopenia (“ITP”).

Other Product Candidates

F573 is our clinical-stage product candidate for the treatment of acute/acute-on-chronic liver failure (“ALF/ACLF”) currently in Phase 2 clinical trials in the PRC. F230 is our clinical-stage product candidate for the treatment of PAH, and we expect to initiate a Phase 1 trial in the PRC in 2025. F528 is our preclinical-stage product candidate for the treatment of COPD.

Commercialization and Development Strategies in Targeted Indications

Overview of Products and Product Candidates

Pulmonary Fibrosis

We are focused on commercializing therapies for the treatment of pulmonary fibrosis and working to solidify our position as a leader in this space.

We are uniquely positioned as the only company with both standard-of-care approved therapies for IPF. Our portfolio includes:

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ETUARY® (pirfenidone) – an antifibrotic agent with anti-inflammatory and antioxidant properties, and one of the first three drugs approved for the treatment of IPF globally. In 2024 and 2023, our revenue from sales of ETUARY was $105.0 million and $112.1 million, respectively

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Nintedanib– a small molecule kinase inhibitor that inhibits lung fibroblast proliferation and migration. In May 2024, Gyre Pharmaceuticals executed a comprehensive agreement with Jiangsu Wangao Pharmaceuticals Co., Ltd. to obtain the drug registration certificate for and become the marketing authorization holder of nintedanib. Gyre Pharmaceuticals is planning to initiate commercialization of the nintedanib product in the PRC in 2025.

Pirfenidone is undergoing one additional Phase 3 trial in the PRC for the treatment of PD and two Phase 3 trials in the PRC for the treatment of DM-ILD and SSc-ILD. We have paused our Phase 3 trials of pirfenidone for the treatment of DM-ILD and SSc-ILD in the PRC to prioritize development of our product candidates in other targeted indications.

Liver Fibrosis

We are also committed to developing effective therapies for the treatment of CHB-associated and MASH-associated liver fibrosis through our lead product candidate, F351 (hydronidone).

F351 is currently in a Phase 3 clinical trial in the PRC for the treatment of CHB-associated liver fibrosis. We commenced patient enrollment for our Phase 3 clinical trial in January 2022 and had our last patient out in October 2024. The topline results of F351 for our Phase 3 trial in the PRC are expected in the second quarter of 2025. In the United States, we are advancing F351 for the treatment of MASH-associated liver fibrosis. We are actively preparing to file an IND application in the first half of 2025. Following results from the PRC Phase 3 trial in CHB-associated liver fibrosis and pending approval of our IND, we expect to initiate a Phase 2 trial to evaluate F351 for the treatment of liver fibrosis associated with MASH in 2025.

F351 has demonstrated a favorable profile for the treatment of CHB-associated liver fibrosis in clinical trials. Due to the severity of the disease and the clinical trial progress of F351, in March 2021, the Center for Drug Evaluation (“CDE”) of the NMPA in the PRC granted F351 a Breakthrough Therapy designation, which helps to accelerate the review of drugs that have early evidence to suggest that the drug may demonstrate a substantial improvement over currently available therapies.

Kidney Fibrosis

We are seeking to advance pirfenidone for the treatment of chronic kidney disease ("DKD"). We completed a Phase 1 trial for DKD in March 2022 and are discussing next steps for this program in 2025 with Chinese authorities.

Other Indications: ALF/ACLF, PAH, COPD, TP with CLD, ITP

We have also expanded our pipeline to address additional fibrotic and inflammatory diseases with significant unmet medical needs:

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F573 (ALF/ACLF) – A clinical-stage compound for acute and acute-on-chronic liver failure. F573 is currently in a Phase 2 trial in the PRC, initiated in March 2023, to evaluate its safety and efficacy in these severe liver conditions.

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F230 (PAH) – A clinical-stage compound for the treatment of pulmonary arterial hypertension. The NMPA approved the IND application for F230 in May 2024. We expect to initiate a Phase 1 trial in PAH in 2025.

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F528 (COPD)– A preclinical-stage candidate targeting chronic obstructive pulmonary disease. F528 is designed to provide a first-line therapy to reduce long-term lung function decline and improve patient outcomes.

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Avatrombopag – A commercial stage product targeting TP with CLD and ITP disease indications. We expect to begin commercialization in 2025.

Our Products for Pulmonary Fibrosis: ETUARY and Nintedanib

We are focused on commercializing therapies for the treatment of pulmonary fibrosis through our two therapeutic products: ETUARY® (pirfenidone) and nintedanib. These two drugs represent the only approved therapeutics as the current standards of care for IPF, and we are uniquely positioned as the only company offering both treatment options.

Our Commercialized Product: ETUARY

ETUARY (pirfenidone capsule) was approved in the PRC as a National Category 1.1 New Drug in 2011 for the treatment of IPF, a rare disease. Given the absence of an approved IPF treatment in the PRC, ETUARY was included in the National Reimbursement Drug List ("NRDL") in 2017 and has since held a dominant market share. Clinical trials have shown that ETUARY can effectively slow down the decline in lung function and IPF disease progression. Moreover, given that different organ fibroses have similar pathogenic mechanisms and fibrosis processes, we are currently working to expand the therapeutic indications of ETUARY to another pulmonary fibrosis disease, PD, as well as diseases causing renal fibrosis, such as DKD.

ETUARY Mechanism of Action

Pulmonary fibrosis is caused by activation of alveolar cells after epithelial damage, which secretes a series of pro-inflammatory cytokines, activating fibroblast proliferation and myofibroblast differentiation and reducing the rate of apoptosis. ETUARY reduces Type I Collagen expression by inhibiting the expression of pro-fibrogenic mediators, including TGF-ß1, platelet-derived growth factor (“PDGF”) and fibroblast growth factor, which ultimately reduces fibroblast proliferation and collagen fiber synthesis and decreases extracellular matrix accumulation. It also inhibits TNF-α, IL-1 and other inflammatory mediators, thus reducing the inflammatory response.

The diagram below illustrates the mechanism of action of pirfenidone.

Our Additional IPF Product: Nintedanib

In May 2024, Gyre Pharmaceuticals executed a comprehensive agreement with Jiangsu Wangao Pharmaceuticals Co., Ltd. to obtain the drug registration certificate for and became the marketing authorization holder of nintedanib, a small-molecule drug for the treatment of idiopathic pulmonary fibrosis, within the PRC. Nintedanib is expected to provide patients with more choices and benefits, and further enhance Gyre Pharmaceuticals’ leading position in the pulmonary fibrosis market. Gyre Pharmaceutical is planning to initiate commercialization of nintedanib in the PRC in 2025.

We anticipate that this launch will drive meaningful revenue growth, expand our market penetration, and enhance brand recognition within the respiratory disease space. Additionally, the commercialization of nintedanib aligns with our broader strategy of building a comprehensive pulmonary care portfolio, potentially creating opportunities for synergies with our existing and future product offerings. We will continue to invest in commercialization efforts, including market access, physician education, and patient support programs, to optimize uptake and maximize the long-term value of this product.

IPF Disease Overview and PRC Market Opportunities

IPF is a rare disease, defined as a chronic, progressive fibrotic interstitial pneumonia of unknown cause to the lungs, occurring primarily in the elderly. It is characterized by progressive worsening of dyspnea and lung function and is associated with a poor prognosis. The average five-year survival rate for patients with IPF is 32%, with the average 10-year survival rate dropping to 16%. According to Frost & Sullivan, the prevalence of IPF in the PRC increased from 89,002 patients in 2018 to 145,776 patients in 2023 at a CAGR of 10.29%, and it is expected to increase to 322,000 patients by 2031 at a CAGR of 10.38% from 2023 to 2031. The total market size of IPF in the PRC increased from $23.9 million in 2018 to $156.8 million in 2023 at a CAGR of 22%, and is expected to reach $344.9 million by 2027 and $698.6 million by 2031 at a CAGR of 20.5% from 2027 to 2031.

The scarring of lung tissues is irreversible. However, proper treatment may slow the rate of fibrosis, increase the patient’s survival rate, alleviate the patient’s symptoms and improve the patient’s quality of life. There are currently two types of IPF drugs approved in the PRC: pirfenidone and nintedanib. They are both clinically shown to slow down the formation of scar tissue in the lungs of IPF patients and are the only drugs that are considered effective for the treatment of organ fibrosis in the PRC. According to the latest guideline for the treatment of IPF issued by the American Thoracic Society, European Respiratory Society, Japanese Respiratory Society and Latin American Thoracic Association, pirfenidone and nintedanib are the only two types of IPF drug conditionally recommended with moderate-quality evidence.

ETUARY Competition in the PRC (IPF)

Sales of ETUARY reached $105.0 million in 2024. Although still a dominant player in the IPF drug market, the market share of ETUARY declined recently primarily due to the rising market share of new drugs, including avatrombopag, marketed as 安博司, which had $20.4 million of sales in 2023, and OFEV (nintedanib), which had $72.1 million of sales in 2023. In 2023, the annual expenditures per patient in the PRC before NRDL reimbursement for ETUARY, avatrombopag marketed as 安博司, and OFEV were $13,106 to $13,378, $10,553, and $15,132, respectively. Despite the recent decrease of market share of ETUARY in the IPF market, we continue to expect a strong sales performance due to sustained increases in the prevalence of IPF and future indication expansion of ETUARY for the potential treatment of PD and other diseases. In addition, there are various barriers to entry for the potential market entrants. For example, it is difficult for new entrants to build an experienced and specialized sales and marketing team in the short term given that sales and marketing strategies of organ fibrosis drugs significantly differ from that of etiological treatment drugs. In addition, long-term and stable collaboration with KOLs and hospitals is critical to developing and optimizing a product portfolio, including effectively educating and penetrating the market and recruiting patients for clinical trials.

PD Disease Overview and PRC Market Opportunities

PD refers to a spectrum of pulmonary diseases caused by inhalation of mineral dust, usually as the result of certain occupations. The main pathological features include chronic pulmonary inflammation and progressive pulmonary fibrosis, which can eventually lead to death caused by respiratory and/or heart failure. PD is widespread and a serious global public health concern. Its high incidence and mortality result from improper occupational protection and the lack of early diagnostic methods and effective treatments.

According to Frost & Sullivan, in the PRC, the prevalence of PD increased from 873,299 patients in 2018 to 938,163 patients in 2023, and it is expected to increase to 970,000 patients by 2028 and 985,000 patients by 2031. The market size of anti-fibrosis drugs for PD is expected to reach $12.1 million by 2027 and $64.1 million by 2031 a CAGR of 58.1% from 2027 to 2031.

To date, there are two pirfenidone product candidates for the treatment of PD in various clinical stages in the PRC. We enrolled the first patient in our Phase 3 clinical trial of ETUARY for the treatment of PD in June 2022, making ETUARY the most clinically advanced anti-fibrosis drug for the treatment of PD in the PRC. As of December 31, 2024, no small molecule or biologic anti-fibrosis product for the treatment of PD had been approved in the PRC.

Phase 3 ETUARY Clinical Trial (PD)

We are conducting a randomized, double-blind, placebo-controlled, multi-center Phase 3 clinical trial to evaluate the efficacy and safety of pirfenidone in the treatment of pneumoconiosis. The primary endpoint is the change in force vital capacity at 52 weeks of treatment compared to baseline. 272 patients will be enrolled in the trial, with 136 in the treatment group and 136 in the control group.

We obtained ethics committee approval as of January 2022 and enrolled the first patient in June 2022. Currently, we have enrolled 172 patients in our Phase 3 clinical trial of ETUARY for the treatment of PD as of December 31, 2024.

Our Product Candidate For Liver Fibrosis: F351 (Hydronidone)

We are strategically focused on addressing liver fibrosis through the development of our lead product candidate, F351 (Hydronidone) for two key indications: CHB-associated liver fibrosis in the PRC and MASH-associated liver fibrosis in the United States. F351 is advancing through critical stages of development and currently in a Phase 3 clinical trial in the PRC for the treatment of CHB-associated liver fibrosis. In October 2024, the last patient completed such trial, and topline data from the Phase 3 clinical trial in the PRC is expected by the second quarter of 2025. Additionally, we completed a Phase 1 trial in the United States for MASH-associated liver fibrosis and are actively preparing to file an IND application in the first half of 2025. We are committed to advancing F351 as a potential first-in-class treatment for these significant unmet needs in liver fibrosis.

CHB Disease Overview and PRC Market Opportunities

CHB is a major cause of liver morbidity and mortality in Asia. Patients chronically infected with the hepatitis B virus tend to experience liver fibrosis and may develop end-stage liver disease, such as decompensated cirrhosis and hepatocellular carcinoma ("HCC"), without intervention. In the PRC, about 70% of cirrhoses were developed from HBV infection, which reflects the significant demand for the treatment of CHB-associated liver fibrosis.

According to Frost & Sullivan, the prevalence of CHB-associated liver fibrosis globally increased from 228.9 million patients in 2018 to 265.0 million patients in 2023. The prevalence of CHB-associated liver fibrosis in the PRC from 2018 to 2023 ranges from 63.6 million to 66.4 million patients and is expected to remain stable in the next 10 years. The anti-liver fibrosis drug market in the PRC has increased from $144.8 million in 2018 to $167.8 million in 2023 with a CAGR of 2.99%. We expect the market to grow to $801.2 million in 2031, at a CAGR of 21.58%.

Etiological treatment is currently the most common treatment of liver fibrosis. For CHB-associated liver fibrosis, antiviral therapy is only able to suppress the viral infection, but is unable to prevent, slow or reverse the progress of fibrosis, suggesting a significant unmet need for effective antifibrotic therapy. Anti-fibrotic treatment is recommended for the treatment of intermediate and advanced liver fibrosis, as well as early-stage cirrhosis. As of December 31, 2024, no chemical or biological drugs treating CHB-associated liver fibrosis have been approved globally. Globally, there are currently a series of drugs that are in late-stage (Phase 2 or later) clinical trials for the treatment of liver fibrosis. Of these clinical-stage drugs, F351 is the most clinically advanced product candidate in the PRC that has the potential to effectively reverse the fibrosis process.

Our CHB-Associated Liver Fibrosis Clinical-Stage Product Candidate: F351 (Hydronidone)

F351, our Phase 3 clinical-stage product candidate in the PRC, has the potential to become the first approved drug to treat CHB-associated liver fibrosis. Of the late clinical-stage drugs for the treatment of liver fibrosis, F351 is the most clinically advanced product candidate in the PRC that has the potential to effectively reverse the fibrosis process.

F351 demonstrated positive results of the reversal of the fibrosis process in our Phase 2 clinical trial in the PRC. Due to the results of the Phase 2 clinical trial and as one of the first drugs in development to treat liver fibrosis, F351 was granted a Breakthrough Therapy designation by the CDE in March 2021 and we commenced patient enrollment for the Phase 3 clinical trial in January 2022. In October 2023, we fully enrolled our 248-patient Phase 3 clinical trial of F351 in the PRC for the treatment of CHB-associated liver fibrosis. In October 2024, the last patient completed this 52-week trial and we expect to report topline data from this trial by the second quarter of 2025.

F351 Mechanism of Action in CHB

When injuries occur and epithelial and/or endothelial cells are damaged, pro-inflammatory cytokines are released by the coagulation cascade for immune cell recruitment, mainly neutrophils and macrophages. These recruited immune cells function as the scavenger to remove tissue debris and dead cells, resulting in acute inflammation. Meanwhile, immune cells themselves release factors like chemokines and cytokines to amplify inflammatory reactions. Next, the released factors, such as TGF-ß1, PDGF, interleukin-13 and interleukin-4, induce the limited activation and proliferation of myofibroblasts. F351 is expected to treat and reverse liver fibrosis in chronic viral hepatitis B by inhibiting the proliferation of HSCs and the TGF-ß1 signaling pathway.

The diagram below illustrates the mechanism of action of F351:

Summary of F351 Clinical Results in CHB

As of December 31, 2024, more than five clinical trials sponsored by us or SG were carried out to explore the clinical risk/benefit of F351. Summarized below are the results of selected key clinical trials of F351 for CHB.

Phase 2 PRC Clinical Trial of F351 for CHB-Associated Liver Fibrosis

We conducted a Phase 2 randomized, double-blind, placebo-controlled, Entecavir-based (the first-line drug for the treatment of CHB virus infection), multi-center, dose-escalation trial assessing the safety and efficacy of F351 for treatment of patients in the PRC with CHB-associated liver fibrosis. The Phase 2 trial was randomized in 240 patients divided into four dose-escalating groups (placebo; 180 mg/day; 270 mg/day; and 360 mg/day) with a primary endpoint of the reduction of the liver fibrosis score (Ishak Scoring System) by greater than or equal to one stage after taking F351 in combination with Entecavir.

The trial met its primary endpoint of a statistically-significant improvement in the liver fibrosis score over the 52-week treatment versus placebo (p=0.0245). The percentages of patients who achieved a fibrosis regression of > 1 were 25.58% (placebo), 40.48% (180 mg/day), 56.10% (270 mg/day) and 43.90% (360 mg/day). Accordingly, the 270 mg/day treatment group showed the highest percentage of patients who were able to reach the primary endpoint.

F351 showed better safety results when compared to the placebo in this trial. In the placebo group, 180 mg treatment group, 270 mg treatment group and 360 mg treatment group, rates of SAEs were 4.65%, 2.38%, 2.38% and 7.32%, respectively, with no statistical significance. A total of seven (4.17%) subjects experienced seven SAEs throughout the trial: two (4.6%) in the placebo group, one (2.38%) in the 180 mg group, one (2.38%) in the 270 mg group and three (7.32%) in 360 mg group, with no statistical significance. The SAEs were laboratory abnormalities, elevation of transaminases, embolic infarction, comminuted fracture, osteoporosis, unplanned pregnancy and hypertension. No deaths occurred.

Topline Phase 3 Results of F351 for CHB-Associated Liver Fibrosis

We are conducting a Phase 3 randomized, double-blind, placebo-controlled, Entecavir-based, multi-center trial assessing the safety and efficacy of F351 for treatment of patients in the PRC with CHB-associated liver fibrosis. The Phase 3 clinical trial was designed to be randomized in 248 patients with a primary endpoint of the reduction of the liver fibrosis score (Ishak Scoring System) by at least one stage after taking F351 in combination with Entecavir.

We commenced patient enrollment for the Phase 3 clinical trials of F351 in January 2022 and completed enrollment in October 2023.

We expect to announce topline results in the second quarter of 2025. Topline results from our Phase 3 trial will be a critical milestone in our clinical development and commercial strategy. A positive outcome has the potential to enhance our commercial sales, strengthen our market position and drive overall company growth.

MASH Disease Overview and U.S. Market Opportunities

MASH, a severe form of metabolic dysfunction-associated steatotic liver disease (“MASLD”), an umbrella of conditions caused by the build-up of extra fat in the liver that is not caused by alcohol intake, is characterized histologically by the additional presence of inflammation and hepatocellular injury, such as visible ballooning, and has a significantly worse prognosis, with the potential to progress to liver fibrosis, cirrhosis or HCC.

MASH represents a large and rapidly growing problem in the U.S. and worldwide. Diagnoses have been on the rise and are expected to increase dramatically in the next decade. The prevalence of MASLD, which affects approximately 25% of the global population, and MASH, which develops in approximately 20% to 30% of MASLD patients, is driven primarily by the worldwide obesity epidemic. As a result, the prevalence of MASH has increased significantly in recent decades, paralleling similar trends in the prevalence of obesity, insulin resistance and Type 2 diabetes. The prevalence of these conditions is expected to increase further due to unhealthy nutrition habits, such as consumption of a diet high in fructose, sucrose and saturated fats, and sedentary behavior.

The critical pathophysiologic mechanisms underlying the development and progression of MASH include reduced ability to metabolize clear lipids, increased insulin resistance, injury to hepatocytes and liver fibrosis in response to hepatocyte injury. MASH patients have an excessive accumulation of fat in the liver resulting primarily from a caloric intake above and beyond energy needs. A healthy liver contains less than 5% fat, but a liver in someone with MASH can contain more than 20% fat. This abnormal liver fat contributes to the progression to MASH, a liver necro-inflammatory state, that can lead to scarring, also known as fibrosis, and, for some, can progress to cirrhosis and liver failure—cirrhosis develops in approximately 20% to 45% of patients. In some cases, cirrhosis progresses to decompensated cirrhosis, which results in permanent liver damage that can lead to liver failure. In addition, it is estimated that 8% of patients with advanced fibrosis will develop HCC. MASH is a complex, multifaceted disease that does not just affect the liver. Patients with MASH frequently have other significant metabolic co-morbidities such as obesity, hyperglycemia, dyslipidemia and systemic hypertension (a constellation of which is commonly referred to as metabolic syndrome) and these further contribute to the risk of cardiovascular disease.

Our MASH-Associated Liver Fibrosis Clinical-Stage Product Candidate: F351 (Hydronidone)

F351, our Phase 1 clinical-stage drug candidate in the United States, has the potential to treat MASH-associated liver fibrosis. We are actively preparing to file an IND application in the first half of 2025. Following IND clearance, we plan to initiate a Phase 2, proof-of-concept clinical trial in 2025 in the United States, subject to positive trends in the Phase 3 clinical trial of F351 in the PRC, to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of F351 for patients with advanced liver fibrosis associated with noncirrhotic MASH.

F351 is a structural analogue of ETUARY, but with medicinal chemistry that has been modified to potentially reduce the safety liabilities associated with Phase 1 metabolism.

F351 Mechanism of Action in MASH

F351 is designed to treat liver fibrosis by inhibiting the activation of hepatic stellate cells (“HSCs”) through Smad7-mediated TGF-ß degradation, as well as decreasing the expression of fibrosis-related genes. The TGF-ß is a central mediator of fibrogenesis in tissues. Activation of the HSCs is recognized as a central event in the progression of liver fibrogenesis, with the TGF-ß as one of the key mediators.

F351 has been shown to inhibitin vitro both p38γ kinase activity and TGF-ß1-induced excessive collagen synthesis in HSCs. This is further supported by its anti-proliferative effects on the HSCs in the liver. In vitro anti-fibrotic effects of F351 were also confirmed in several establishedin vivo rodent models of liver fibrosis, such as carbon tetrachloride (“CCl 4”)-induced liver fibrosis mouse model, DMN-induced liver fibrosis rat model, and HSA-induced liver fibrosis rat model, as well as mouse model of MASH fibrosis (CCl 4 +Western [High Fat] Diet). In the MASH mouse model, F351 significantly reduced the severity of fibrosis, as well as demonstrated improvements in the functional, biochemical and histopathological attributes of the affected liver tissue, including a significant reduction of hydroxyproline content and liver enzymes (ALT), aspartate (AST), a decrease in liver fat degeneration, and decreases in the levels of several of inflammatory cytokines at doses of 3-10 mg/kg/day, as well as a decrease in the NAS score in the CCl 4 and WD-induced fibrosis and cell ballooning MASH models at doses of 15-50 mg/kg bid (HEDs of 144 – 480 mg) which are relevant to human exposure. Thus, the key attributes of F351’s molecular mechanisms of action in animal models of liver fibrosis support its efficacy potential in liver fibrosis of various etiologies including those associated with MASH.

Summary of F351 Clinical Results in MASH

Phase 1 U.S. Clinical Trial of F351 for MASH-Associated Liver Fibrosis

We have completed a Phase 1 clinical trial that evaluated the safety, tolerability, and PK of single and multiple doses of F351 in U.S. healthy volunteers, and collected bridging data to the data obtained in healthy volunteers in the PRC. This Phase 1 clinical trial of F351 was conducted on the basis of an IND that was filed in 2016 for F351 as an anti-fibrotic agent with a focus on liver fibrosis associated with a spectrum of chronic liver diseases.

Following single oral doses of F351 (30 mg or 120 mg) in Part I of the trial, F351 was rapidly absorbed, showing a linear PK pattern of exposure with mean elimination half-life of five to six hours, and five to seven hours for M3 and M4 metabolites. Following repeated oral doses of F351 (30 mg or 120 mg TID) for seven days in Part II of the trial, F351 capsules were rapidly absorbed with a similar PK pattern of exposure and similar half-life as seen following single doses of F351. Modest accumulation (less than a 1.5-fold increase) was observed for F351, M3 and M4 with repeated 30 mg or 120 mg TID. Dose-normalized F351 Cmax and AUC values were similar in males and females.

Overall, F351 was well tolerated when administered as a single oral dose of 30 mg or 120 mg and when administered as repeated oral doses of 30 mg or 120 mg TID for seven consecutive days. There were no premature discontinuations due to adverse events (“AEs”), no serious adverse events (“SAEs”), and no deaths reported in this trial. Treatment-emergent AEs reported following single dose administration in Part I of the trial included a single AE of rhinorrhea and scattered, isolated, reversible laboratory abnormalities. Treatment-emergent AEs reported following repeated dose administration in Part II of the trial included headache (25.0%), constipation (16.7%) and somnolence (12.5%). Abdominal discomfort and flatulence were also reported as gastrointestinal AEs in one subject each. There were no clinically significant overall changes in safety laboratory tests that were attributable to trial drug product, including no evidence of any significant drug-induced liver injury or clinically significant overall changes in vital signs, ECG parameters or physical examinations that were attributable to trial drug product.

Anticipated Phase 2 U.S. Clinical Trial of F351 for MASH-Associated Liver Fibrosis

Following IND clearance, we plan to initiate Phase 2 clinical development of F351 in MASH-associated liver fibrosis. We expect to file the IND in the first half of 2025. The goal of the proposed Phase 2 clinical trial is to obtain early proof-of-concept for F351 in subjects with MASH-associated liver fibrosis as a basis of expansion into a more comprehensive Phase 2/3 clinical program. This trial will be conducted under a new IND, reflecting the distinct risk-benefit profile that the drug may have in a MASH patient population. To support the IND filing and initiation of the proposed Phase 2 clinical trial, we plan to cross-reference all nonclinical and clinical data obtained in trials completed under the currently-active IND in the United States, as well as those previously completed in the PRC. We believe that the results obtained in these nonclinical and clinical studies provide adequate information on the current clinical risk/benefit profile of the drug and allow for safe initiation of the proposed Phase 2 clinical trial of F351 in MASH-associated liver fibrosis.

F351 Competition in the U.S. (MASH)

The biopharmaceutical industry is intensely competitive and subject to rapid innovation and significant technological advancements. We believe the key competitive factors that will affect the development and commercial success of F351 and any future product candidates are efficacy, safety and tolerability profile, reliability, convenience of dosing, price, the level of generic competition and reimbursement. Our competitors include multinational pharmaceutical companies, specialized biotechnology companies, universities and other research institutions. A number of biotechnology and pharmaceutical companies are pursuing the development or marketing of pharmaceuticals that target the same diseases that we are targeting. Smaller or earlier-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large, established companies. Given the high incidence of MASH, it is likely that the number of companies seeking to develop products and therapies for the treatment of liver and cardio-metabolic diseases, such as MASH, will increase.

If F351 is approved for the treatment of MASH-associated liver fibrosis, future competition could arise from five main classes of drugs aiming to reach the market in the current MASH landscape: Farnesoid X receptor agonists, fibroblast grow factor 21, thyroid hormone receptor-β agonists, glucagon-like peptide 1 (“GLP-1”) agonists, and PPAR agonists, but there are others as well. Resmetirom, a beta-thyroid hormone receptor agonist from Madrigal Pharmaceuticals, Inc. became the first drug to be approved by FDA for the treatment of adults with noncirrhotic MASH with moderate to advanced liver fibrosis, to be used along with diet and exercise; other candidates include VK2809 a beta-thyroid hormone receptor agonist from Viking Therapeutics, Inc.; Aldafermin, an FGF19 analog from NGM Biopharmaceuticals, Inc.; denifanstat, a novel fatty acid synthase (FASN) inhibitor from Sagimet Biosciences; MK-3655, an FGFR1c/KLB agonist antibody from Merck & Co., Inc.; Efruxifermin, a FGF21 fusion protein from Akero Therapeutics, Inc.; Pegozafermin, a FGF21 fusion protein from 89bio, Inc.; Belapectin, a Galectin-3 inhibitor from Galectin Therapeutics Inc.; Aramchol, a synthetic conjugate of cholic acid and arachidic acid from Galmed Pharmaceuticals Ltd.; Semaglutide, a GLP-1 receptor agonist from Novo Nordisk A/S; Pemvidutide/ALT-801, a dual GLP-1/glucagon agonist from Altimmune; Tirzepatide, a dual GIP/GLP-1 receptor agonist from Eli Lilly and Company; Lanifibranor, a PPAR alpha/delta/gamma agonist from Inventiva; NNC0194-0499, an FGF21 analog from Novo Nordisk; BOS-580, an FGF21 analog from Boston Pharmaceuticals; and BFKB8488A, and an FGFR1/KLB agonist antibody from Genentech.

F351 Manufacturing and Supply

The manufacturing of F351 active pharmaceutical ingredients (“API”) and drug product supplies required for supporting the Phase 2 clinical trial in MASH-associated liver fibrosis was completed at WuXi STA, based in the PRC. The API and drug product are of current Good Manufacturing Practice (“cGMP”) grade quality, and batch release and stability studies comply with applicable regulatory requirements.

In light of the legislation known as the BIOSECURE Act, which was proposed in the 118 th Congress, we have taken several measures to strengthen our supply chain in the event that Wuxi Biologics, Inc. (“Wuxi Biologics”) or one of our other manufacturers is impacted. The version of the BIOSECURE Act introduced in the U.S. House of Representatives during the 118 th Congress would prohibit federal agencies from entering into procurement contracts with, as well as providing grants and loans to, an entity that uses biotechnology equipment or services from a biotechnology company of concern, and includes a grandfathering provision allowing biotechnology equipment and services provided or produced by named “biotechnology companies of concern” under a contract or agreement entered into before the effective date until January 1, 2032. The pathway and timing for the BIOSECURE Act or its provisions to become law are uncertain. We are carefully monitoring and assessing the situation surrounding Wuxi Biologics and deliberating various options, including switching to a different CDMO for F351 clinical trials in the U.S. We will also continue to closely monitor geopolitical risk and implement additional mitigations and supply chain redundancies, as needed. See the risk factor entitled “Manufacturing pharmaceutical products on a large commercial scale is highly exacting and complex, and we and our third-party manufacturers may encounter problems during the process.”

Our Product Candidate For Kidney Fibrosis: Pirfenidone

DKD Disease Overview and PRC Market Opportunities

DKD is a chronic kidney disease (“CKD”) caused by diabetes mellitus. DKD is clinically manifested as specific pathological structural and functional changes in the kidney of diabetes patients. In addition, DKD has become the primary cause of progression from CKD to the end-stage renal disease and one of the main diseases causing renal fibrosis. As one of the serious complications of diabetes, DKD in the PRC is characterized by high prevalence, low awareness rate, low treatment rate and low control rate.

According to Frost & Sullivan, the prevalence of DKD in the PRC increased from 47 million patients in 2018 to 53.6 million patients in 2023, and it is expected to increase to 61.6 million patients by 2031. The DKD market in the PRC increased from $26.4 billion in 2018 to $40.2 billion in 2023 and it is predicted to expand to $54.0 billion by 2028 and $60.5 billion by 2031.

The standard of care for DKD has been blood glucose control, blood pressure control and blood liquid control. However, current therapeutic strategies are far from being completely effective because no available therapy successfully prevents DKD and many patients still progress to end-stage renal disease. The current available drugs for the treatment of DKD include hypoglycemic drugs, antihypertensive drugs and lipid-lowering drugs. As of December 31, 2024, there was one approved treatment for DKD in many parts of the world, finerenone (marketed under the name KERENDIA).

Pirfenidone has demonstrated positive therapeutic effects on DKD due to its unique mechanism of action. Several growth factors or cytokines that are locally produced in the kidney appear to contribute to the extracellular matrix accumulation, inflammation and scarring in progressive DKD. The TGF-ß1 system is activated and plays a pathogenetic role in DKD in animal models of type 1 and type 2 diabetes. In addition, several studies in patients with type 1 and type 2 diabetes indicate increased renal production of TGF-ß1. The TNF-α’ system has also recently been linked with human DKD on the basis of circulating blood levels and gene expression in kidneys from patients with DKD. Pirfenidone has been found to inhibit TGF-ß1 production and consequent matrix deposition in experimental animal models of kidney disease. In animal models and cell culture studies, pirfenidone also reduces TNF-α’ production. Previous studies also showed that oral pirfenidone administered to db/db mice after the onset of established DKD was effective in reducing glomerulosclerosis.

DKD Phase 1 Clinical Trial of Pirfenidone in the PRC

We conducted an open-label, parallel-controlled, single-center clinical trial to evaluate the safety and PK of a single dose of pirfenidone capsules in patients with CKD stages G2 and G3a. 24 subjects were enrolled, consisting of 12 patients with renal insufficiency and 12 healthy volunteers.

The Phase 1 clinical trial was completed in March 2022. In this trial, pirfenidone was tolerated when used in patients with CKD G2 and G3a, there were no significant changes in the main pharmacokinetic parameters compared with healthy controls, and no dose adjustment was required.

We are currently discussing further steps with Chinese authorities for 2025 plans in DKD.

Our Product Candidate for ALF/ACLF: F573

ALF/ACLF Disease Overview and PRC Market Opportunities

ALF/ACLF is severe liver damage caused by a variety of factors, resulting in severe impairment or loss of synthesis of detoxification, metabolism and biotransformation functions. ALF/ACLF can follow with symptoms of jaundice, coagulation dysfunction, hepatorenal syndrome, hepatic encephalopathy and ascites. The causes of ALF/ACLF are complex and include the hepatitis viruses (especially HBV) and other viruses, drugs, hepatotoxic substances (e.g., alcohol and chemical agents), bacteria and parasites. In the PRC, HBV, drugs and hepatotoxic substances are the most common causes of ALF/ACLF.

According to Frost & Sullivan, the prevalence of ALF/ACLF in the PRC was 42,440 patients in 2018 and 38,130 patients in 2023 and is expected to be 32,940 patients in 2028 and 29,720 patients in 2031. The market size of ALF/ACLF in the PRC was $274.2 million in 2018 and $254.0 million in 2023 and it is expected to be $219.8 million in 2028 and $198.5 million in 2031.

The main treatment options for liver failure include comprehensive medical therapy, non-biological artificial liver support treatment and liver transplantation. Medical treatment mainly includes general supportive therapy, symptomatic treatment, etiological treatment and treatment for complications.

Our ALF/ACLF Clinical-Stage Product Candidate: F573

F573 is a caspase inhibitor and a potential Category 1 new drug for the treatment of ALF/ACLF. We enrolled the first subject for the Phase 1 clinical trial in January 2022 and initiated a Phase 2 clinical trial in March 2023 in the PRC. Our Phase 2 clinical trial of F573 as a treatment for ALF/ACLF is expected to be completed by the end of 2026.

F573 Mechanism of Action in ALF/ACLF

Inflammatory response and immune dysfunction can lead to massive liver cell death, which causes ALF/ACLF. Therefore, inhibiting the apoptosis process of normal hepatocytes helps to delay the progression of ALF/ACLF. The main mediating pathways of hepatocyte apoptosis include the mitochondrial pathway and the death receptors pathway, where the caspase family plays an important role as the main executive molecules. The main mechanism of F573 is to inhibit the activity of the caspase family, including caspases 1, 3, 6, 7, 8 and 9 and to reduce the cleavage effects on poly-ADP-ribose polymerase, thus blocking the cell apoptosis process mediated by endogenous or exogenous signals. As a result, hepatic failure is expected to be alleviated by F573.

The diagram below illustrates the mechanism of action of F573:

Preclinical Data of F573 for ALF/ACLF

The efficacy profile of F573 has been demonstrated in four preclinical studies. Inin vitro studies, F573 had a significant inhibitory effect on apoptosis in a variety of cells. Specifically, F573 had a protective effect on HeLa cells, human normal hepatocytes L02 and Jurkat cells, while inhibiting Caspase-3 enzyme activity and reducing its ability to cleave the substrate AC-DEVD-AMC. F573 improved liver function and alleviated the liver injury caused by D-GalN/LPS-induced fulminant liver failure in rats, which significantly inhibited hepatocyte necrosis and apoptosis and showed a preventive and therapeutic effect on acute and severe liver injury. In a pharmacodynamic acute liver injury experiment on D-Gal/LPS mortality in mice, F573 had a protective effect against acute liver injury caused by D-Gal and LPS in km mice and prolonged the survival time of km mice. F573 has been shown to improve liver function and reduce liver injury in ConA-induced acute liver failure in BALB/c mice. F573 significantly inhibits hepatocyte necrosis and apoptosis and has a preventive and therapeutic effect on acute and severe liver injury.

Phase 1 PRC Clinical Trial of F573 for the treatment of ALF/ACLF

We enrolled the first subject for our Phase 1 clinical trial to assess the tolerance and PK of single and multiple doses of F573 in January 2022. We recruited 100 healthy subjects for this trial and completed the Phase 1 clinical observations of tolerability and PK in July 2022. The Cmax of F573 was not dose-dependent at the dose range from 0.5 mg/kg to 2.0 mg/kg, and AUC0-t and AUC0-∞ of F573 showed linear pharmacokinetics. The rate of absorption of F573 showed sex differences. F573 was administered once a day for seven days without accumulation in the human body.

Phase 2 PRC Clinical Trial of F573 for the treatment of ALF/ACLF

We initiated our Phase 2 clinical trial in March 2023. The main objective of this trial is to assess the efficacy and safety of F573 for injection in the treatment of liver injury/failure. The Phase 2 trial is divided into three stages:

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First Stage: 16 patients with 1/2 grade drug-induced liver injury (“DILI”) or other liver injury patients and 9 patients with CHB were enrolled. First, DILI or other liver injury patients were treated with the trial drug at either 0.5 mg/kg, 1.0 mg/kg, 2.0 mg/kg or placebo in a 1:1:1:1 ratio. CHB patients received the trial drug. The first stage was completed in December 2024.

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Second Stage: 24 patients with liver injury (DILI patients and patients with intrahepatic cholestatic liver injury) are expected to be enrolled. Qualified subjects will be screened and randomly assigned in a 3:1 ratio to receive the investigational drug or placebo, once daily for 14 consecutive days. The dosage is expected to be 0.5 mg/kg and 2.0 mg/kg based on a comprehensive consideration of the efficacy and safety test results from the first stage. The 0.5 mg/kg dose group trial will be conducted first, enrolling 12 subjects. After the 0.5 mg/kg dose group trial is completed, the 2.0 mg/kg dose group trial will be conducted, also enrolling 12 subjects.

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Third Stage: The third stage is expected to employ a randomized, double-blind, placebo-controlled design. The trial is divided into a screening period (14 days), a treatment period (28 days), and a follow-up period (90 days). Qualified subjects will be randomly assigned in a 3:1 ratio to receive the investigational drug or placebo, once daily for 28 consecutive days. The dosage will be determined based on a comprehensive consideration of the efficacy and safety test results from the first and second stages. Subjects will also receive concomitant administration of the drug acetylcysteine injection. After discontinuation of treatment, subjects will undergo a 90-day safety follow-up.

Our Product Candidate for PAH: F230

F230 is a selective endothelin-receptor A antagonist to treat PAH. PAH is a rare disease and a progressive, life-threatening disorder characterized by increased pressure in the pulmonary arteries that carry blood from the heart to the lungs. A common pathological hallmark of PAH is vascular remodeling, including increased stiffening and thickening of pulmonary arteries. This restricts blood flow through the lungs, causing pulmonary hypertension and making the heart work harder to pump blood to the lungs. The exact cause of PAH is unknown and there is no known cure for PAH. PAH is a serious disease that has a short life expectancy if left untreated. The prognosis for the treatment of PAH is poor, with a high mortality rate and survival of less than three years in the absence of standard therapy.

According to Frost & Sullivan, the prevalence of PAH in the PRC increased from 50,600 patients in 2018 to 60,600 patients in 2023 and it is expected to increase to 68,600 patients by 2028 and 70,600 patients by 2031. The market size of PAH in the PRC increased from $0.31 billion in 2018 to $0.37 billion in 2023 and it is expected to increase to $0.44 billion by 2028 and $0.48 billion by 2031.

In the study of hypoxia-induced PAH in rats, F230 resulted in significant decreases of, or exhibited a decrease trend based on different dose groups in, mean pulmonary arterial pressure, right ventricular systolic pressure, right ventricular/left ventricular plus septum and pulmonary artery wall thickness. Even at minimum effective dosage, the differences of those indexes between treatment group and PAH group are statistically significant. In March 2024, we submitted an IND application for F230 to the PRC Center for NMPA. In May 2024, we obtained the approval from the NMPA for the IND to launch a new clinical trial in the PRC of F230. We expect to launch the Phase 1 clinical trial in the PRC in 2025.

Our Product Candidate for COPD: F528

F528 is an anti-inflammatory small molecule drug candidate developed for the treatment of COPD. F528 is a novel anti-inflammation agent that targets inhibition of multiple inflammatory cytokines and could modify the progression of COPD with extreme low toxicityin vivo. COPD is a chronic inflammatory lung disease which causes obstructed air flow from the lungs. It consists of three separate illnesses: emphysema, chronic bronchitis and chronic obstructive asthma. COPD causes the destruction of barriers between alveoli inside the lungs, causing airways to get swollen and clogged with mucus. In most cases, COPD develops very slowly and symptoms may emerge for years before being diagnosed.

According to Frost & Sullivan, prevalence of COPD in the PRC increased from 103.5 million patients in 2018 to 107.3 million patients in 2023 and is expected to increase to 113.1 million patients in 2028 and 116.4 million patients in 2031. The COPD market in the PRC was $0.88 billion in 2018 to $1.06 billion in 2023. The market is predicted to expand to $1.29 billion by 2028 and $1.46 billion by 2031.

The drug treatment of COPD is mainly used to relieve symptoms, reduce the frequency and severity of disease deterioration and improve cardio endurance and health. Currently, there is no conclusive clinical trial evidence showing that existing drugs can slow down the long-term decline in lung function. For late-stage COPD patients, currently-available treatment options achieve limited therapeutic effects. As clinical research results from external parties indicated, 2% of patients were reported to gain improvement in exercise capability after 24 months of standard medical treatment and none were reported to gain improved health-related quality of life. Thus, there are significant unmet clinical needs for COPD patients.

We believe F528 could become first-line therapy for COPD. In a preclinical study of the effect of F528 in rats with COPD induced by smoke exposure and LPS tracheal injection, the lung index, the alveolar space and the lung injury score were significantly decreased after the treatment of F528. Preclinical validation of F528 is expected to be completed in 2025, including non-Good Laboratory Practices ("GLP") toxicology studies, GLP toxicology studies, and large animal safety studies. IND submission is expected in 2026.

Our Commercialization Plans in TP with CLD and ITP

Our Commercial-Stage Product Candidate: Avatrombopag

Gyre Pharmaceuticals acquired avatrombopag under a transfer agreement with Nanjing Healthnice Pharmaceutical Technology, Co., Ltd. (“Nanjing Healthnice”) in June 2021. In June 2024, Gyre Pharmaceuticals received approval from the NMPA for avatrombopag maleate tablets for the treatment of TP associated with CLD in adult patients undergoing elective diagnostics procedures or therapy. TP is the most common hematologic complication in patients with CLD and can be life threatening in severe cases. Avatrombopag is an oral thrombopoietin receptor agonist. In January 2025, Gyre Pharmaceuticals received approval from the NMPA for avatrombopag maleate tablets to expand the treatment indications of avatrombopag maleate tablets to include ITP. Gyre Pharmaceuticals plans to start commercializing the avatrombopag product in the PRC in 2025.

Our Product Candidate for DM-ILD and SSc-ILD: Pirfenidone

We were previously conducting two Phase 3 clinical trials of pirfenidone for the treatment of DM-ILD and SSc-ILD. We are prioritizing the development of our product candidates for other targeted indications and, as a result, have paused our two Phase 3 trials in the PRC for the treatment of DM-ILD and SSc-ILD. We may decide to continue such Phase 3 trials in the future.

Intellectual Property

Our success depends in part upon our ability to protect our core technology and intellectual property. Our intellectual property is critical to our business and we strive to protect it through a variety of approaches, including by obtaining and maintaining patent protection in the United States and internationally for our product candidates, new targets, indications and applications and other inventions important to our business. For our product candidates, we generally pursue patent protection covering compositions of matter, methods of manufacture and methods of use. As we further develop our product candidates, we plan to identify additional novel candidates for patent protection that may potentially enhance commercial success, including pursuit of claims directed to new therapeutic indications. We enter into collaboration agreements and other relationships with pharmaceutical companies and other industry participants to leverage our intellectual property or gain access to the intellectual property of others.

Patents

As of the date of this Annual Report, Gyre owns 26 granted patents globally, 20 pending patent applications in the PRC and nine Patent Cooperation Treaty (“PCT”) patent applications. As of the date of this Annual Report, we are the owner of all the patents and patent applications that are material to our business.

The term of individual patents depends on the legal term for patents in the jurisdictions in which they are granted. In most jurisdictions, the patent term for inventions is 20 years from the earliest claimed filing date of a non-provisional patent application in the applicable jurisdiction. The actual protection afforded by a patent varies on a claim-by-claim and country-by-country basis and depends upon many factors, including the type of patent, the scope of its coverage, the availability of any patent term extensions or adjustments, the availability of legal remedies in a particular country and the validity and enforceability of the patent.

Although ETUARY’s (Pirfenidone) substance patent expired in August 1993, Gyre currently holds one process patent that expires in 2038. In addition, Gyre holds a family of patents for methods using Pirfenidone compositions to treat certain cytotoxic- or radiation-induced injuries, such as pneumonitis, consisting of granted patents in Canada, Europe, Japan, the PRC, and the U.S.

Our F351 patent portfolio currently consists of ten patent families, including patents and/or patent applications in various countries and under the PCT. The first patent family is for a method of preparing F351 and consists of one granted patent in the PRC that expires in 2028, two granted pants in Japan, both of which expire in 2037, and 2 PCT patent applications and 6 pending patent applications in the PRC. The second patent family is for a method of preparing a crystal form of F351 and consists of one granted patent in the PRC that expires in 2041. The third patent family relates to methods for using F351 to treat and/or prevent chronic hepatitis B with hepatic fibrosis and consists of one PCT patent application and one pending patent application in each of Australia, Canada, Europe, the PRC, India, Japan and Mexico, and the U.S. The fourth patent family pertains to the use of pharmaceutical compositions or drug kits in the preparation of drugs to treat or relieve pulmonary fibrosis or to improve the symptoms of pulmonary fibrosis and consists of one pending patent application in the PRC and one PCT patent application. The fifth patent family is for F351 compositions and methods of using F351 for treating liver fibrosis, liver cirrhosis, advanced hepatitis B and NASH and consists of one PCT patent application and one pending patent application in each of the PRC, Australia, Canada, Europe, Israel, Japan, Mexico, New Zealand, Singapore, South Korea and the U.S. The sixth patent family pertains to the use of pharmaceutical compositions or drug kits in the preparation of drugs to treat or prevent chronic renal failure and consists of one pending patent application in the PRC. The seventh patent family pertains to the use of pharmaceutical compositions or drug kits in the preparation of drugs to treat or prevent chronic kidney disease and consists of one pending patent application in the PRC. The eighth patent family pertains to the use of pharmaceutical compositions or drug kits in the preparation of drugs to treat or prevent radiation induced pulmonary fibrosis and consists of one pending patent application in the PRC. The ninth patent family pertains to the use of pharmaceutical compositions or drug kits in the preparation of drugs to treat or prevent fibrotic diseases and consists of one pending patent application in the PRC. The tenth patent family pertains to the use of pharmaceutical compositions or drug kits in the preparation of drugs to treat fatty liver disease associated with metabolic dysfunction and consists of one pending patent application in the PRC.

For F573, Gyre owns two granted patents in the PRC, which both expire in 2031, one patent application in the PRC, one PCT patent application, and one patent application in each of Europe, Japan, South Korea, the PRC and the U.S. For F528, Gyre owns one PCT patent application, one patent in each of the PRC and Japan, and pending patent applications in Europe and the U.S.

We expect to continue to file patent applications to cover methods of treating additional indications, as well as new forms, formulations, and methods of manufacturing F351 and other drug candidates.

Gyre Patent Family Tree

Trade Secrets

We may rely, in some circumstances, on trade secret and/or confidential information to protect aspects of our technology. We seek to protect our proprietary technology and processes, in part, by entering into confidentiality agreements with consultants, scientific advisers and contractors. We have entered into confidentiality agreements and non-competition agreements with our senior management and key members of our R&D team and other employees who have access to trade secrets or confidential information about our business.

We also seek to preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security of our information technology systems. For details of risks related thereto, see “Risk Factors—Risks Related to Our Intellectual Property”.

Trademarks and Domain Names

We conduct our business under the brand name of “Continent” or “”. As of December 31, 2024, we own four registered artwork copyrights, 24 registered software copyrights and 55 registered trademarks in the PRC. We also own seven registered trademarks in Hong Kong, one international trademark of “ETUARY” and the trademark application of “ETUARY” in seven countries and regions including the United States, EU and Japan. As of the same date, we also hold 15 active domain names.

Our Business Operations in the United States: Gyre Therapeutics, Inc.

In this section, references to “we,” “our,” “us” and “our company” refer to Gyre Therapeutics, Inc.

Our U.S. operations are headquartered in San Diego, CA, and primarily focus on the development and commercialization of F351 for the treatment MASH-associated liver fibrosis.

Employees in the United States

We consider our ability to recruit, retain and motivate our employees to be critical to our success. We are an equal opportunity employer and are fundamentally committed to creating and maintaining a work environment in which employees are treated with respect and dignity. We strive to administer all human resources policies, practices and actions related to hiring, promotion, compensation, benefits and termination in accordance with the principal of equal employment opportunity, meaning on the basis of individual skills, knowledge, abilities, job performance and other legitimate criteria and without regard to race, color, religion, sex, sexual orientation, gender expression or identity, ethnicity, national origin, ancestry, age, mental or physical disability, genetic information, any veteran status, any military status or application for military service, or membership in any other category protected under applicable law.

As of December 31, 2024, we had five full-time employees in the United States. We have no collective bargaining agreements with our employees, and we have not experienced any work stoppages. We consider our relations with our employees to be good.

We aim to provide our employees with competitive salary and benefits that enable them to achieve a good quality of life and plan for the future. Our benefits are based on local norms and market preferences, but include all salary and social benefits required by local law (including paid time off for vacation and sick leave) and many additional benefits that go beyond legal requirements.

U.S. Business Organization

We commenced operations in 2002 and are a Delaware corporation. On August 20, 2015, we merged with Targacept, Inc. and on October 30, 2023, we completed the Contributions and became Gyre Therapeutics, Inc. Our corporate headquarters are in San Diego, California. We conduct general and administrative functions primarily from our San Diego, California location.

Available Information

Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, are available for free at www.gyretx.com as soon as reasonably practicable after they are electronically filed with or furnished to the SEC. They are also available for free on the SEC’s website at www.sec.gov. The information in or accessible through the SEC and our website are not incorporated into, and are not considered part of, this filing.

Business Combination

On December 26, 2022, Catalyst Biosciences, Inc. (“Catalyst”) entered into an Asset Purchase Agreement with GNI Group Ltd. (“GNI Japan”) and GNI Hong Kong Limited (“GNI Hong Kong”) (collectively, the “Sellers”) to acquire all assets and intellectual property rights primarily related to the proprietary F351 compound, excluding those in the PRC. Under the agreement, Catalyst paid $35 million in consideration, consisting of 6,266,521 shares of Catalyst common stock and 12,340 shares of Series X Convertible Preferred Stock. Concurrently, Catalyst entered into a Business Combination Agreement with GNI USA, Inc. (“GNI USA”), GNI Japan, GNI Hong Kong, Shanghai Genomics, Inc., and certain minority shareholders to acquire an indirect controlling interest in Beijing Continent Pharmaceuticals Co., Ltd. (now Gyre Pharmaceuticals Co., Ltd.) through equity contributions by GNI USA and the minority shareholders.

On October 27, 2023, Catalyst entered into a Securities Purchase Agreement with GNI USA for a private placement of 8,110,000 units, comprising Convertible Preferred Stock and warrants, for an aggregate purchase price of approximately $5 million. Effective October 30, 2023, Catalyst increased its authorized shares of common stock, effected a 1-for-15 reverse stock split, and changed its name to Gyre Therapeutics, Inc. On the same date, the business combination was completed, with GNI USA and the minority shareholders contributing their respective equity interests in exchange for shares of Gyre common stock. Following these transactions, GNI USA owned approximately 85.3% of Gyre’s outstanding shares, the minority shareholders owned approximately 12.3%, and pre-combination Catalyst stockholders held approximately 2.5%, assuming full conversion of the Convertible Preferred Stock. As a result, Gyre became primarily engaged in the research, development, manufacturing, and commercialization of innovative therapies for organ fibrosis.

Government Regulation in the United States

Government authorities in the United States, at the federal, state and local levels, and in other countries and jurisdictions, including the EU, extensively regulate, among other things, the research, development, testing, product approval, manufacture, quality control, manufacturing changes, packaging, storage, recordkeeping, labeling, promotion, advertising, sales, distribution, marketing, and import and export of drugs. Our current product candidates are expected to be regulated as pharmaceutical drugs. The processes for obtaining regulatory approval in the United States and in foreign countries and jurisdictions, along with compliance with applicable statutes and regulations and other regulatory authorities both pre- and post-commercialization, are a significant factor in the production and marketing of our products and our R&D activities and require the expenditure of substantial time, human capital and financial resources.

Review and Approval of Drugs

In the United States, the FDA and other government entities regulate drugs under the Federal Food, Drug, and Cosmetic Act ("FDCA") and the regulations promulgated thereunder, as well as other federal and state statutes and regulations. Failure to comply with applicable legal and regulatory requirements in the United States at any time during the product development process, approval process, or after approval, may subject us to a variety of administrative or judicial sanctions, such as a delay in approving or refusal by the FDA to approve pending applications, withdrawal of approvals, delay or suspension of clinical trials, issuance of warning letters and other types of regulatory letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, civil monetary penalties, refusals of or debarment from government contracts, exclusion from the federal healthcare programs, restitution, disgorgement of profits, civil or criminal investigations by the FDA, U.S. Department of Justice, State Attorneys General, and/or other agencies, False Claims Act suits and/or other litigation, and/or criminal prosecutions.

An applicant seeking approval to market and distribute a new drug in the United States must typically undertake the following:

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completion of pre-clinical laboratory tests, animal studies, chemical synthesis and manufacturing and formulation studies in compliance with the FDA’s GLP, regulations;

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submission to the FDA of an IND for human clinical testing, which must become effective without FDA objection before human clinical trials may begin;

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approval by an independent institutional review board (“IRB”), representing each clinical site before each clinical trial may be initiated;

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performance of adequate and well-controlled human clinical trials in accordance with the FDA’s good clinical practice (“GCP”), regulations, to establish the safety and effectiveness of the proposed drug product for each indication for which approval is sought;

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preparation and submission to the FDA of an NDA;

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review of the NDA by an FDA advisory committee, where applicable;

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satisfactory completion of one or more FDA inspections of the manufacturing facility or facilities at which the drug product, and the active pharmaceutical ingredient or ingredients thereof, are produced to assess compliance with cGMP, regulations and to assure that the facilities, methods, and controls are adequate to ensure the product’s identity, strength, quality, and purity;

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payment of user fees, as applicable, and securing FDA approval of the NDA; and

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compliance with any post-approval requirements, such as any risk evaluation and mitigation strategy (“REMS”), or post-approval studies required by the FDA.

Preclinical Studies and an IND

To file an IND, an organization must produce batches of the actual material of drug substance and drug product to be used in the clinical trial. The batches of drug substance and drug product need to be characterized analytically before release and placed on stability. At least one month of stability data must be included in the IND upon submission.

Preclinical studies can includein vitro and animal studies to assess the potential for adverse events and, in some cases, to establish a rationale for therapeutic use. The conduct of preclinical studies is subject to federal regulations and requirements, including GLP regulations. Other studies include laboratory evaluation of the purity, stability and physical form of the manufactured drug substance or API and the physical properties, stability and reproducibility of the formulated drug or drug product. An IND sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available clinical data or literature and plans for clinical studies, among other things, to the FDA as part of an IND to justify that the proposed clinical study may safely proceed. Some preclinical testing, such as longer-term toxicity testing, animal tests of reproductive adverse events and carcinogenicity, may continue after the IND is submitted. An IND automatically becomes effective 30 days after receipt by the FDA, unless before that time the FDA raises concerns or questions related to a proposed clinical trial and places the trial on clinical hold. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. As a result, submission of an IND may not result in the FDA allowing clinical trials to commence.

Following commencement of a clinical trial under an IND, the FDA may place a clinical hold on that trial. A clinical hold is an order issued by the FDA to the sponsor to delay a proposed clinical investigation or to suspend an ongoing investigation. A partial clinical hold is a delay or suspension of only part of the clinical work requested under the IND. For example, a specific protocol or part of a protocol is not allowed to proceed, while other protocols may do so. No more than 30 days after imposition of a clinical hold or partial clinical hold, the FDA will provide the sponsor a written explanation of the basis for the hold. Following issuance of a clinical hold or partial clinical hold, an investigation may only resume after the FDA has notified the sponsor that the investigation may proceed. The FDA will base that determination on information provided by the sponsor correcting the deficiencies previously cited or otherwise satisfying the FDA that the investigation can proceed.

Human Clinical Studies in Support of an NDA

Clinical trials involve the administration of the investigational product to human subjects under the supervision of qualified investigators in accordance with GCP requirements, which include, among other things, the requirement that all research subjects provide their informed consent in writing before their participation in any clinical trial. Clinical trials are conducted under written study protocols detailing, among other things, the objectives of the study, the parameters to be used in monitoring safety and the effectiveness criteria to be evaluated. A protocol for each clinical trial and any subsequent protocol amendments must be submitted to the FDA as part of the IND. In addition, an IRB representing each institution participating in the clinical trial must review and approve the plan for any clinical trial before it commences at that institution, and the IRB must conduct continuing review and reapprove the study at least annually. The IRB must review and approve, among other things, the study protocol and informed consent information to be provided to study subjects. An IRB must operate in compliance with FDA regulations.

Information about certain clinical trials must be submitted within specific timeframes to the NIH for public dissemination on its ClinicalTrials.gov website.

Human clinical trials are typically conducted in three sequential phases, which may overlap or be combined:

Phase 1: The product candidate is initially introduced into healthy human subjects or patients with the target disease or condition and tested for safety, dosage tolerance, absorption, metabolism, distribution, excretion and, if possible, to gain an early indication of its effectiveness.

Phase 2: The product candidate is administered to a limited patient population to identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases and to determine dosage tolerance and optimal dosage.

Phase 3: The product candidate is administered to an expanded patient population, generally at geographically dispersed clinical trial sites, in well-controlled clinical trials to generate enough data to statistically evaluate the efficacy and safety of the product for approval, to establish the overall risk-benefit profile of the product, and to provide adequate information for the labeling of the product.

Progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and more frequently if serious adverse events occur. Phase 1, Phase 2, and Phase 3 clinical trials may not be completed successfully within any specified period, or at all. Furthermore, the FDA or the sponsor may suspend or terminate a clinical trial at any time on various grounds, including a finding that the research subjects are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution, or an institution it represents, if the clinical trial is not being conducted in accordance with the IRB’s requirements or if the drug has been associated with unexpected serious harm to patients. The FDA will typically inspect one or more clinical sites in late-stage clinical trials to assure compliance with GCP and the integrity of the clinical data submitted.

A sponsor may choose, but is not required, to conduct a foreign clinical study under an IND. In the United States, when a foreign clinical study is conducted under an IND, all IND requirements must be met unless waived, and some of the requirements may be waived upon the FDA’s decision. When the foreign clinical study is not conducted under an IND, the sponsor must ensure that the study complies with applicable FDA regulatory requirements in order to use the study as support for an IND or application for marketing approval or licensure, including that the study was conducted in accordance with GCP, including review and approval by an independent ethics committee and use of proper procedures for obtaining informed consent from subjects, and the FDA is able to validate the data from the study through an onsite inspection if the FDA deems such inspection necessary. The GCP requirements encompass both ethical and data integrity standards for clinical studies.

Submission of an NDA to the FDA

Assuming successful completion of required clinical testing and other requirements, the results of the preclinical and clinical studies, together with detailed information relating to the product’s chemistry, manufacture, controls and proposed labeling, among other things, are submitted to the FDA as part of an NDA requesting approval to market the drug product for one or more indications.

Under certain circumstances, the FDA will waive the application fee for the first human drug application that a small business, defined as a company with less than 500 employees, including employees of affiliates, submits for review. An affiliate is defined as a business entity that has a relationship with a second business entity if one business entity controls, or has the power to control, the other business entity, or a third-party controls, or has the power to control, both entities. In addition, an application to market a prescription drug product that has received orphan designation is not subject to a prescription drug user fee unless the application includes an indication for other than the rare disease or condition for which the drug was designated. Under the Orphan Drug Act, the FDA may grant orphan designation to a drug intended to treat a disease or condition that affects fewer than 200,000 individuals in the United States, or for which there is no reasonable expectation that U.S. sales will be sufficient to recoup the development and production costs.

The FDA conducts a preliminary review of an NDA within 60 days of its receipt and informs the sponsor by the 74th day after the FDA’s receipt of the submission to determine whether the application is sufficiently complete to permit substantive review. The FDA may request additional information rather than accept an NDA for filing. In this event, the application must be resubmitted with the additional information. The resubmitted application is also subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-depth substantive review. The FDA has agreed to specified performance goals in the review process of NDAs. Most such applications are meant to be reviewed within ten months from the date of filing, and most applications for “priority review” products are meant to be reviewed within six months of filing. The review process may be extended by the FDA for three additional months to consider new information or clarification provided by the applicant to address an outstanding deficiency identified by the FDA following the original submission.

Before approving an NDA, the FDA typically will inspect the facility or facilities where the product is manufactured. The FDA will not approve an application unless it determines that the manufacturing processes and facilities are in compliance with GMP requirements and adequate to assure consistent production of the product within required specifications. Additionally, before approving an NDA, the FDA will typically inspect one or more clinical sites to assure compliance with GCP.

The FDA also may require submission of a REMS plan to mitigate any identified or suspected serious risks. The REMS plan could include medication guides, physician communication plans, assessment plans, and elements to assure safe use, such as restricted distribution methods, patient registries, or other risk minimization tools.

The FDA is required to refer an application for a novel drug to an advisory committee or explain why such referral was not made. Typically, an advisory committee is a panel of independent experts, including clinicians and other scientific experts, that reviews, evaluates and provides a recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making decisions.

The FDA’s Decision on an NDA

On the basis of the FDA’s evaluation of the NDA and accompanying information, including the results of the inspection of the manufacturing facilities, the FDA may issue an approval letter or a complete response letter. An approval letter authorizes commercial marketing of the product with specific prescribing information for specific indications. A complete response letter generally outlines the deficiencies in the submission and may require substantial additional testing or information for the FDA to reconsider the application. If those deficiencies have been addressed to the FDA’s satisfaction in a resubmission of the NDA, the FDA will issue an approval letter. The FDA has committed to reviewing such resubmissions in two or six months depending on the type of information included. Even with submission of this additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval.

If the FDA approves a product, it may limit the approved indications for use for the product, require that contraindications, warnings or precautions be included in the product labeling, require that post-approval studies be conducted to further assess the drug’s safety after approval, require testing and surveillance programs to monitor the product after commercialization, or impose other conditions, including distribution restrictions or other risk management mechanisms, including REMS, which can materially affect the potential market and profitability of the product. After approval, the FDA may seek to prevent or limit further marketing of a product based on the results of post-market studies or surveillance programs. Some types of changes to the approved product, such as adding new indications, manufacturing changes and additional labeling claims, are subject to further testing requirements and FDA review and approval.

Fast Track Designation, Accelerated Approval, Priority Review, Orphan Drug Designation and Breakthrough Therapy Programs

Fast Track

There are several FDA programs intended to help facilitate the development of new drugs that meet certain criteria. Specifically, new drugs are eligible for Fast Track designation if they are intended to treat a serious or life-threatening condition and data demonstrate the potential to address unmet medical needs for the condition. Fast Track designation applies to the combination of the product and the specific indication for which it is being studied. The sponsor of a new drug may request the FDA to designate the drug as a Fast Track product at any time during the clinical development of the product. Under a Fast Track designation, the FDA may consider for review sections of the marketing application on a rolling basis before the complete application is submitted, if the sponsor provides a schedule for the submission of the sections of the application, the FDA agrees to accept sections of the application and determines that the schedule is acceptable and the sponsor pays any required user fees upon submission of the first section of the application.

Priority Review

A product is eligible for priority review if it is for a drug that treats a serious condition and, if approved, would provide a significant improvement in safety or effectiveness of the treatment, diagnosis or prevention of a disease compared to marketed products. The FDA will attempt to direct additional resources to the evaluation of an application for a new drug designated for priority review to facilitate the review.

Accelerated Approval

A product that is being studied for safety and effectiveness in treating serious or life-threatening illnesses and provides meaningful advantage over existing treatments may receive accelerated approval, which means that it may be approved on the basis of adequate and well-controlled clinical trials establishing that the product has an effect on a surrogate endpoint that is reasonably likely to predict a clinical benefit, or on the basis of an effect on an intermediate clinical endpoint that can be measured earlier than, and is reasonably likely to predict an effect on, irreversible morbidity or mortality. As a condition of approval, the FDA may require that a sponsor of a drug receiving accelerated approval perform adequate and well-controlled post-marketing clinical trials. Under the Food and Drug Omnibus Reform Act of 2022, the FDA may require, as appropriate, that such studies be underway prior to approval or within a specific time period after the date of approval for a product granted accelerated approval. The FDA also has increased authority for expedited procedures to withdraw approval of a product or indication approved under accelerated approval if the sponsor fails to conduct the required post-marketing studies or if such studies fail to verify the predicted clinical benefit. In addition, the FDA currently requires pre-approval of promotional materials as a condition for accelerated approval, which could adversely impact the timing of the commercial launch of the product.

Orphan Drug Designation

Under the Orphan Drug Act, the FDA may grant orphan drug designation to drugs intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States. Orphan drug designation must be requested before submitting an NDA. After the FDA grants orphan drug designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan drug designation does not convey any advantage in or shorten the duration of the regulatory review and approval process. If a product that has orphan drug designation subsequently receives FDA approval for the disease for which it has such designation, the product is entitled to orphan product exclusivity, which means that the FDA may not approve any other applications to market the same drug for the same disease, except in limited circumstances, for seven years. These circumstances are an inability to supply the drug in sufficient quantities or a situation in which a new formulation of the drug has shown superior safety or efficacy or a major contribution to patient care. This exclusivity, however, could also block the approval of its product for seven years if a competitor obtains earlier approval of the same drug for the same indication.

The FDA’s interpretation of the scope of orphan drug exclusivity may change. The FDA’s longstanding interpretation of the Orphan Drug Act is that exclusivity is specific to the orphan indication for which the drug was actually approved. As a result, the scope of exclusivity has been narrow and protected only against competition from the same “use or indication” rather than the broader “disease or condition.” In the September 2021 case Catalyst Pharmaceuticals, Inc. v. FDA, a federal circuit court set aside the FDA’s narrow interpretation and ruled that orphan drug exclusivity covers the full scope of the orphan-designated disease or condition regardless of whether the drug obtains approval only for a narrower use. The decision concerned amifampridine, a drug used to treat Lambert-Eaton myasthenic syndrome (LEMS). Depending on how the FDA applies the decision beyond this case, it may limit the drugs that can receive exclusivity.

Breakthrough Therapy Designation

A product may also be eligible for receipt of a Breakthrough Therapy designation. The Breakthrough Therapy designation is intended to expedite the FDA’s review of a potential new drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease where “preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development.” The designation of a drug as a Breakthrough Therapy provides the same benefits as are available under the Fast Track program, as well as intensive FDA guidance on the product’s development program. Fast Track designation, priority review, accelerated approval and Breakthrough Therapy designation do not change the standards for approval, but they may expedite the development or approval process.

Post-Approval Requirements

Drugs manufactured or distributed pursuant to FDA approvals are subject to pervasive and continuing regulation by the FDA, including, among other things, requirements relating to recordkeeping, periodic reporting, product sampling and distribution, advertising and promotion and reporting of adverse experiences with the product. After approval, most changes to the approved product, such as adding new indications or other labeling claims, are subject to prior FDA review and approval. There also are continuing, annual user fee requirements for any marketed products and the establishments at which such products are manufactured, as well as new application fees for supplemental applications with clinical data.

In addition, drug manufacturers and other entities involved in the manufacture and distribution of approved drugs are required to register their establishments with the FDA and state agencies and are subject to periodic unannounced inspections by the FDA and these state agencies for compliance with cGMP requirements. Changes to the manufacturing process are strictly regulated and often require prior FDA approval before being implemented.

FDA regulations also require investigation and correction of any deviations from cGMP and impose reporting and documentation requirements upon the sponsor and any third-party manufacturers that the sponsor may decide to use. Accordingly, manufacturers must continue to expend time, money, and effort in the area of production and quality control to maintain cGMP compliance.

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product, including adverse events or problems with manufacturing processes of unanticipated severity or frequency, or failure to comply with regulatory requirements, may result in revisions to the approved labeling to add new safety information; imposition of post-market studies or clinical trials to assess new safety risks; or imposition of distribution or other restrictions under a REMS program. Other potential consequences include, among other things:

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restrictions on the marketing or manufacturing of the product, complete withdrawal of the product from the market or product recalls;

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fines, warning letters or holds on post-approval clinical trials;

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refusal of the FDA to approve pending NDAs or supplements to approved NDAs, or suspension or revocation of product license approvals;

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product seizure or detention, or refusal to permit the import or export of products; or

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injunctions or the imposition of civil or criminal penalties.

The FDA strictly regulates marketing, labeling, advertising and promotion of products that are placed on the market. Drugs may be promoted only for the approved indications and in accordance with the provisions of the approved label. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to significant criminal and civil liability.

In addition, the distribution of prescription pharmaceutical products is subject to the Prescription Drug Marketing Act, (“PDMA”), which regulates the distribution of drugs and drug samples at the federal level and sets minimum standards for the registration and regulation of drug distributors by the states. Both the PDMA and state laws limit the distribution of prescription pharmaceutical product samples and impose requirements to ensure accountability in distribution.

Abbreviated New Drug Applications for Generic Drugs

In 1984, with passage of the Drug Price Competition and Patent Term Restoration Act of 1984 (commonly referred to as the “Hatch-Waxman Amendments”) amending the FDCA, Congress authorized the FDA to approve generic drugs that are the same as drugs previously approved by the FDA under the NDA provisions of the statute. To obtain approval of a generic drug, an applicant must submit an abbreviated new drug application (“ANDA”) to the agency. Upon approval of an ANDA, the FDA indicates that the generic product is “therapeutically equivalent” to the drug product previously approved under an NDA, known as the reference listed drug (“RLD”), and it assigns a therapeutic equivalence rating to the approved generic drug in its publication “Approved Drug Products with Therapeutic Equivalence Evaluations,” also referred to as the “Orange Book.” Physicians and pharmacists consider the therapeutic equivalence rating to mean that a generic drug is fully substitutable for the RLD. In addition, by operation of certain state laws and numerous health insurance programs, the FDA’s designation of a therapeutic equivalence rating often results in substitution of the generic drug without the knowledge or consent of either the prescribing physician or patient.

Under the Hatch-Waxman Amendments, the FDA may not approve an ANDA until any applicable period of nonpatent exclusivity for the RLD has expired. The FDCA provides a period of five years of data exclusivity for NDAs containing a new chemical entity. In cases where such exclusivity has been granted, an ANDA may not be filed with the FDA until the expiration of five years unless the submission is accompanied by a Paragraph IV certification (discussed further below), in which case the applicant may submit its application four years following the original product approval. The FDCA also provides for a period of three years of exclusivity if the NDA includes reports of one or more new clinical investigations, other than bioavailability or bioequivalence studies, that were conducted by or for the applicant and are essential to the approval of the application. This three-year exclusivity period often protects changes to a previously approved drug product, such as a new dosage form, route of administration, combination or indication.

Hatch-Waxman Patent Certification and the 30 Month Stay

Upon approval of an NDA or a supplement thereto, NDA sponsors are required to list with the FDA each patent with claims that cover the applicant’s product or a method of using the product. When an ANDA applicant files its application with the FDA, the applicant is required to certify to the FDA concerning any patents listed for the reference product in the Orange Book, except for patents covering methods of use for which the ANDA applicant is not seeking approval.

A certification that the new product will not infringe the already approved product’s listed patents or that such patents are invalid or unenforceable is called a Paragraph IV certification. If the applicant does not challenge the listed patents or indicate that it is not seeking approval of a patented method of use, the ANDA application will not be approved until all the listed patents claiming the referenced product have expired. If the ANDA applicant has provided a Paragraph IV certification to the FDA, the applicant must also send notice of the Paragraph IV certification to the NDA and patent holders once the ANDA has been accepted for filing by the FDA. The NDA and patent holders may then initiate a patent infringement lawsuit in response to the notice of the Paragraph IV certification. The filing of a patent infringement lawsuit within 45 days after the receipt of a Paragraph IV certification automatically prevents the FDA from approving the ANDA until the earlier of 30 months, expiration of the patent, settlement of the lawsuit or a decision in the infringement case that is favorable to the ANDA applicant.

505(b)(2) New Drug Applications

As an alternative path to FDA approval for modifications to formulations or uses of products previously approved by the FDA pursuant to an NDA, an applicant may submit an NDA under Section 505(b)(2) of the FDCA. Section 505(b)(2) was enacted as part of the Hatch-Waxman Amendments and permits the filing of an NDA where at least some of the information required for approval comes from studies not conducted by, or for, the applicant, and for which the applicant has not obtained a right of reference. If the 505(b)(2) applicant can establish that reliance on the FDA’s previous findings of safety and effectiveness is scientifically and legally appropriate, it may eliminate the need to conduct certain preclinical studies or clinical trials of the new product. The FDA may also require companies to perform additional bridging studies or measurements, including clinical trials, to support the change from the previously approved reference drug. The FDA may then approve the new drug candidate for all, or some, of the label indications for which the reference drug has been approved, as well as for any new indication sought by the 505(b)(2) applicant.

To the extent that a Section 505(b)(2) applicant is relying on studies conducted for an already approved product, the applicant is required to certify to the FDA concerning any patents listed for the approved product in the Orange Book to the same extent that an ANDA applicant would. As a result, approval of a 505(b)(2) NDA can be stalled until all the listed patents claiming the referenced product have expired, until any non-patent exclusivity, such as exclusivity for obtaining approval of a new chemical entity, listed in the Orange Book for the referenced product has expired, and, in the case of a Paragraph IV certification and subsequent patent infringement suit, until the earlier of 30 months, settlement of the lawsuit or a decision in the infringement case that is favorable to the Section 505(b)(2) applicant.

Patent Term Extension

In the U.S., after an NDA is approved, owners of relevant drug patents may apply for up to a five-year patent extension, which permits patent term restoration as compensation for the patent term lost during the FDA regulatory process. The allowable patent term extension is typically calculated as one-half the time between, the latter of the effective date of an IND and issue date of the patent for which extension is sought, and the submission date of an NDA, plus the time between NDA submission date and the NDA approval date up to a maximum of five years. The time can be shortened if the FDA determines that the applicant did not pursue licensure with due diligence. The total patent term after the extension may not exceed 14 years from the date of product licensure. Only one patent applicable to a licensed biological product is eligible for extension and only those claims covering the product, a method for using it, or a method for manufacturing it may be extended and the application for the extension must be submitted prior to the expiration of the patent in question. However, we may not be granted an extension because of, for example, failing to exercise due diligence during the testing phase or regulatory review process, failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents or otherwise failing to satisfy applicable requirements. Some, but not all, foreign jurisdictions possess patent term extension or other additional patent exclusivity mechanisms that may be more or less stringent and comprehensive than those of the U.S.

Disclosure of Clinical Trial Information

Sponsors of clinical trials of FDA-regulated products, are required to register and disclose certain clinical trial information. Information related to the product, patient population, phase of investigation, trial sites and investigators and other aspects of the clinical trial is then made public as part of the registration. Sponsors are also obligated to discuss the results of their clinical trials after completion. Disclosure of the results of these trials can be delayed in certain circumstances for up to two years after the date of completion of the trial. Competitors may use this publicly available information to gain knowledge regarding the progress of development programs.

Other U.S. Healthcare Laws and Compliance Requirements

In the United States, our activities are potentially subject to regulation by various federal, state and local authorities in addition to the FDA, including but not limited to the Centers for Medicare and Medicaid Services, other divisions of the U.S. Department of Health and Human Services (e.g., the Office of Inspector General), the U.S. Department of Justice (“DOJ”) and individual U.S. Attorney offices within the DOJ and state and local governments. For example, sales, marketing and scientific/educational grant programs must comply with the anti-fraud and abuse provisions of the Social Security Act, the false claims laws, the privacy provisions of the Health Insurance Portability and Accountability Act (“HIPAA”) and similar state laws, each as amended.

The federal Anti-Kickback Statute prohibits, among other things, any person or entity, from knowingly and willfully offering, paying, soliciting or receiving any remuneration, directly or indirectly, overtly or covertly, in cash or in kind, to induce or in return for purchasing, leasing, ordering or arranging for the purchase, lease or order of any item or service reimbursable under Medicare, Medicaid or other federal healthcare programs. The term remuneration has been interpreted broadly to include anything of value. The Anti-Kickback Statute has been interpreted to apply to arrangements between pharmaceutical manufacturers on one hand and prescribers, purchasers and formulary managers on the other. There are statutory exceptions and regulatory safe harbors protecting some common activities from prosecution. The exceptions and safe harbors are drawn narrowly and practices that involve remuneration that may be alleged to be intended to induce prescribing, purchasing or recommending may be subject to scrutiny if they do not qualify for an exception or safe harbor. Failure to meet all the requirements of a particular applicable statutory exception or regulatory safe harbor does not make the conduct per se illegal under the Anti-Kickback Statute. Instead, the legality of the arrangement will be evaluated on a case-by-case basis based on a cumulative review of all its facts and circumstances. Our practices may not in all cases meet all the criteria for protection under a statutory exception or regulatory safe harbor.

Additionally, the intent standard under the Anti-Kickback Statute was amended by the Affordable Care Act (“ACA”) to a stricter standard such that a person or entity no longer needs to have actual knowledge of the statute or specific intent to violate it to have committed a violation. In addition, the ACA codified case law that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the federal False Claims Act (discussed below).

The civil monetary penalties statute imposes penalties against any person or entity who, among other things, is determined to have presented or caused to be presented a claim to a federal health program that the person knows or should know is for an item or service that was not provided as claimed or is false or fraudulent.

The federal False Claims Act prohibits, among other things, any person or entity from knowingly presenting, or causing to be presented, a false claim for payment to, or approval by, the federal government or knowingly making, using, or causing to be made or used, a false record or statement material to a false or fraudulent claim to the federal government. As a result of a modification made by the Fraud Enforcement and Recovery Act of 2009, a claim includes “any request or demand” for money or property presented to the U.S. government. Recently, several pharmaceutical and other healthcare companies have been prosecuted under these laws for allegedly providing free product to customers with the expectation that the customers would bill federal programs for the product. Other companies have been prosecuted for causing false claims to be submitted because of the companies’ marketing of the product for unapproved and thus non-reimbursable, uses. HIPAA created new federal criminal statutes that prohibit knowingly and willfully executing, or attempting to execute, a scheme to defraud or to obtain, by means of false or fraudulent pretenses, representations or promises, any money or property owned by, or under the control or custody of, any healthcare benefit program, including private third-party payors and knowingly and willfully falsifying, concealing or covering up by trick, scheme or device, a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of, or payment for healthcare benefits, items or services.

Also, many states have similar fraud and abuse statutes or regulations that apply to items and services reimbursed under Medicaid and other state programs, or, in several states, apply regardless of the payor.

Additionally, the federal Physician Payments Sunshine Act within the ACA and its implementing regulations, require that certain manufacturers of drugs, devices, biological and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program (with certain exceptions) to report information related to certain payments or other transfers of value made or distributed to various healthcare professionals including physicians, physician assistants, nurse practitioners, clinical nurse specialists, certified nurse anesthetists, certified nurse-midwives and teaching hospitals, or to entities or individuals at the request of, or designated on behalf of, the physicians and teaching hospitals and to report annually certain ownership and investment interests held by physicians and their immediate family members. To distribute products commercially, we must comply with state laws that require the registration of manufacturers and wholesale distributors of drug products in a state, including, in certain states, manufacturers and distributors who ship products into the state even if such manufacturers or distributors have no place of business within the state. Some states also impose requirements on manufacturers and distributors to establish the pedigree of product in the chain of distribution, including some states that require manufacturers and others to adopt new technology capable of tracking and tracing product as it moves through the distribution chain. Several states have enacted legislation requiring pharmaceutical and biotechnology companies to establish marketing compliance programs, file periodic reports with the state, make periodic public disclosures on sales, marketing, pricing, clinical trials and other activities and/or register their sales representatives, as well as to prohibit pharmacies and other healthcare entities from providing certain physician prescribing data to pharmaceutical and biotechnology companies for use in sales and marketing and to prohibit certain other sales and marketing practices. All our activities are potentially subject to federal and state consumer protection and unfair competition laws. If our operations are found to be in violation of any of the federal and state healthcare laws described above or any other governmental regulations that apply to us, we may be subject to penalties, including without limitation, civil, criminal and/or administrative penalties, damages, fines, disgorgement, exclusion from participation in government programs, such as Medicare and Medicaid, injunctions, private “qui tam” actions brought by individual whistleblowers in the name of the government, or refusal to allow us to enter into government contracts, contractual damages, reputational harm, administrative burdens, diminished profits and future earnings and the curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our results of operations.

Data Privacy and Security

We may be subject to data privacy and security regulations by both the federal government and the states in which we conduct our business. HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act (“HITECH”) and its implementing regulations, imposes requirements relating to the privacy, security and transmission of individually identifiable health information. Among other things, HITECH makes HIPAA’s privacy and security standards directly applicable to business associates, independent contractors or agents of covered entities that receive or obtain protected health information in connection with providing a service on behalf of a covered entity. HITECH also created four new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business associates and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorneys’ fees and costs associated with pursuing federal civil actions. In addition, state laws govern the privacy and security of health information in specified circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts.

In addition, state health information privacy laws, such as California’s Confidentiality of Medical Information Act and Washington’s My Health My Data Act, govern the privacy and security of health-related information, specifically, may apply even when HIPAA does not and impose additional requirements.

Even when HIPAA and state health information privacy laws do not apply, according to the FTC and state Attorneys General, violating consumers’ privacy rights or failing to take appropriate steps to keep consumers’ personal information secure may constitute unfair acts or practices in or affecting commerce in violation of Section 5(a) of the Federal Trade Commission Act and state consumer protection laws.

There are also a number of U.S. state privacy laws, such as the California Consumer Privacy Act of 2018, as amended by the California Privacy Rights Act of 2020 (“CCPA”), that govern the privacy and security of personal information in certain circumstances, some of which are more stringent than HIPAA and in various ways. Numerous other states have passed similar laws, but many differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts. The CCPA applies to personal data of consumers, business representatives, and employees, and imposes obligations on certain businesses that do business in California, including to provide specific disclosures in privacy notices, and affords rights to California residents in relation to their personal information. Health information falls under the CCPA’s definition of personal information where it identifies, relates to, describes, or is reasonably capable of being associated with or could reasonably be linked, directly or indirectly, with a particular consumer or household—unless it is subject to HIPAA—and is included under a new category of personal information, “sensitive personal information,” which is offered greater protection. Some of these laws and regulations impose different, and in certain instances, more stringent requirements than HIPAA. Failing to comply with these laws and regulations can result in significant civil and/or criminal penalties, as well as exposure to private litigation, all of which can result in financial and reputational risks. The numerous other comprehensive privacy laws that have passed or are being considered in other states, as well as at the federal and local levels, also exempt some data processed in the context of clinical trials; but others exempt covered entities and business associates subject to HIPAA altogether, further complicating compliance efforts, and increasing legal risk and compliance costs for us and the third parties upon whom we rely.

Coverage, Pricing and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any product candidates for which we obtain regulatory approval. In the United States and markets in other countries, sales of any products for which we receive regulatory approval for commercial sale will depend, in part, on the extent to which third-party payors provide coverage and establish adequate reimbursement levels for such products. In the United States, third-party payors include federal and state healthcare programs, privately managed care providers, health insurers and other organizations. The process for determining whether a third-party payor will provide coverage for a product may be separate from the process for setting the price of a product or for establishing the reimbursement rate that such a payor will pay for the product. Third-party payors may limit coverage to specific products on an approved list, also known as a formulary, which might not include all the FDA-approved products for a particular indication. Third-party payors are increasingly challenging the price, examining the medical necessity and reviewing the cost effectiveness of medical products, therapies and services, in addition to questioning their safety and efficacy. We may need to conduct expensive pharmaco-economic studies to demonstrate the medical necessity and cost-effectiveness of our products, in addition to the costs required to obtain the FDA approvals. Our product candidates may not be considered medically necessary or cost-effective. A payor’s decision to provide coverage for a product does not imply that an adequate reimbursement rate will be approved. Further, one payor’s determination to provide coverage for a product does not assure that other payors will also provide coverage for the product. This is also true of Medicare reimbursement, where different vendors process payments, so that coverage by one vendor does not assure that all other vendors will provide coverage. Adequate third-party reimbursement may not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development. In addition, the United States federal government position on matters related to drug pricing is evolving and uncertain and any changes could have a material impact on drug pricing generally in the United States, including for our product candidates if approved. Recently, the U.S. government passed the Inflation Reduction Act, which authorizes the U.S. Department of Health and Human service to negotiate prices of certain drugs with participating manufacturers in federal healthcare programs.

Different pricing and reimbursement schemes exist in other countries. In the EU, governments influence the price of pharmaceutical products through their pricing and reimbursement rules and control of national healthcare systems that fund a large part of the cost of those products to consumers. Some jurisdictions operate positive and negative list systems under which products may only be marketed once a reimbursement price has been agreed. To obtain reimbursement or pricing approval, some of these countries may require the completion of clinical trials that compare the cost-effectiveness of a particular product candidate to currently available therapies. Other member states allow companies to fix their own prices for medicines but monitor and control company profits. The National Institute for Health and Care Excellence (NICE) in the United Kingdom also requires consideration of cost-benefit analysis. The downward pressure on healthcare costs has become very intense. As a result, increasingly high barriers are being erected to the entry of new products. In addition, in some countries, cross-border imports from low-priced markets exert a commercial pressure on pricing within a country.

The marketability of any product candidates for which we receive regulatory approval for commercial sale may suffer if the government and third-party payors fail to provide adequate coverage and reimbursement. In addition, emphasis on managed care in the United States has increased and we expect will continue to increase the pressure on healthcare pricing. Coverage policies and third-party reimbursement rates may change at any time. Even if favorable coverage and reimbursement status is attained for one or more products for which we receive regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future.

The Foreign Corrupt Practices Act

The Foreign Corrupt Practices Act (“FCPA”), prohibits any U.S. individual or business from paying, offering, or authorizing payment or offering of anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries and to devise and maintain an adequate system of internal accounting controls for international operations.

Additional Regulation

In addition to the foregoing, state and federal laws regarding environmental protection and hazardous substances, including the Occupational Safety and Health Act, the Resource Conservancy and Recovery Act and the Toxic Substances Control Act, affect our business. These and other laws govern the use, handling and disposal of various biological, chemical and radioactive substances used in and wastes generated by, our operations. If our operations result in contamination of the environment or expose individuals to hazardous substances, we could be liable for damages and governmental fines. We believe that we are in material compliance with applicable environmental laws and that continued compliance therewith will not have a material adverse effect on our business. We cannot predict, however, how changes in these laws may affect our future operations.

Our Operations in the PRC: Gyre Pharmaceuticals

In this section, references to “we,” “our,” “us” and “our company” refer to Beijing Continent Pharmaceuticals Co., Ltd. (d/b/a Gyre Pharmaceuticals Co., Ltd.) (“Gyre Pharmaceuticals”).

Gyre Pharmaceuticals was founded in 2002 and is an innovative drug development enterprise in the PRC committed to the treatment of organ fibrosis diseases, integrated R&D, production and commercialization. Gyre Pharmaceuticals is an indirect, majority-owned subsidiary of Gyre Therapeutics, Inc.

Overview of our PRC Operations

We are a commercial-stage biopharmaceutical company committed to the research, development, manufacturing and commercialization of innovative drugs for organ fibrosis. We initially focused on the treatment of IPF and have gradually broadened our therapeutic field and R&D efforts to other areas of organ fibrosis. Our flagship product, ETUARY, was approved in the PRC in 2011 and is among the first three approved drugs for IPF worldwide.

As the PRC’s first approved treatment for IPF, ETUARY has been included in the NRDL of the PRC since 2017. Filling a vacuum in the PRC as the first approved IPF treatment, ETUARY has developed rapidly and maintained a dominant market share in the PRC. The total estimated market size for IPF treatments in the PRC was $156.8 million in 2023 and is expected to grow to $698.6 million by 2031, according to Frost & Sullivan. Moreover, as different organ fibrosis diseases share a similar pathogenic mechanism and fibrosis process, we are seeking to expand the use of ETUARY to include other pulmonary fibrosis diseases, such as PD, as well as diseases causing renal fibrosis, such as DKD. The success of ETUARY in the IPF drug market lays the foundation for our R&D and registration strategy to further expand the use of such drugs to indications with large patient populations.

We are one of a limited number of biopharmaceutical companies in the PRC that has grown from a development-stage company to achieving sustained profitability. This growth was primarily attributable to the increased market demand for ETUARY, which is the first IPF drug marketed in the PRC. We face limited competition in the IPF drug market and we direct our marketing resources to encourage physician adoption of ETUARY.

Through in-house R&D efforts and collaborative arrangements with GNI Japan, we have developed, in addition to ETUARY, a pipeline of pharmaceutical product candidates at various phases of clinical development, including F351, F528, F230 and F573.

Based on our years of research into organ fibrosis, we have also expanded our R&D to include potential treatments for COPD, PAH and ALF/ACLF.

While advancing the R&D of our pipeline products, we are one of only a few biopharmaceutical companies focusing on organ fibrosis drugs in the PRC with manufacturing and commercialization capabilities and an established track record. For further details about our two manufacturing centers, manufacturing capabilities and processes, see “—Properties—Gyre Pharmaceuticals’ Properties” and “—Production and Quality Control—In-House Manufacturing Facilities.” For further details about our professional sales team and a comprehensive sales network, see “—Sales, Marketing and Distribution.”

Employees in the PRC

As of December 31, 2024, we had 574 total employees, including 165 employees in Beijing, 41 employees in Cangzhou and 368 employees in other regions, which were primarily our sales and marketing employees located across the nation. We recruit our employees based on a number of factors, including work experience, educational background and the requirements of a relevant vacancy. We provide internal and external training for our management staff and other employees in various areas, such as product knowledge, project development and team building. We provide our employees with regular feedback and assess our employees based on their performance to determine their salary, promotion and career development.

In compliance with the relevant PRC labor laws, we enter into individual employment contracts with our employees covering matters such as terms, wages, bonuses, employee benefits, workplace safety and grounds for termination. The remuneration package of our employees includes salary and bonus, which are generally based on their qualifications, industry experience, position and performance. We consider the remuneration package of our employees to be competitive among our domestic competitors. The social insurance and housing provident funds for our employees have been paid in full during the years ended December 31, 2024 and 2023.

We are also subject to safety laws and regulations of the PRC. We have implemented various internal occupational health and safety procedures to maintain a safe work environment, including adopting protective measures at our production centers, inspecting our equipment and facilities regularly to identify and address safety hazards and providing regular training to our employees on safety awareness.

As of December 31, 2024, we have formed a labor union to represent our employees. We believe that we have maintained good working relationships with our employees. During the year ended December 31, 2024, we were not subject to any material claims, lawsuits, penalties or administrative actions relating to non-compliance with occupational health and safety laws or regulations and had not experienced any strikes, labor disputes or industrial actions which have had a material effect on our business.

Occupational, Health, Safety and Environmental Matters

We are subject to various health, safety, social and environmental laws and regulations and our operations are regularly inspected by local government authorities. We are committed to social responsibility and consider environmental, social and governance essential to our continuous development and we believe we have adequate policies to promote compliance with applicable health, safety, social and environmental protection regulations.

Under the oversight of the senior management, we actively identify and monitor the actual and potential impact of environmental, social and climate-related risks on our business, strategy and financial performance and incorporate considerations for these issues into our business, strategic and financial planning with a particular focus on areas such as employee responsibility, environment responsibility and public responsibility. Corporate social responsibility is viewed as part of our core growth philosophy and pivotal to our ability to create sustainable value for our stockholders.

In addition, we monitor and enforce the compliance of our operations with environment, health and safety laws and regulations. This responsibility is executed through training, formulation and implementation of strategies, policies, standards and metrics, communication of environmental, health and safety policies and procedures through a team of coordinators, environmental, health and safety audits and incident response planning and implementation. With the oversight of our management, our quality control team assesses the likelihood of such risks occurring and the estimated magnitude of any potential impact.

Permits and Other Approvals

As of December 31, 2024, we have received all material permissions and approvals required for our business operations. As of December 31, 2024, our wholly-owned subsidiary (Beijing Continent Biomedical Technology Co., Ltd., a company organized under the laws of the PRC) has obtained a business license but has no business operations. The following table sets forth the details of material licenses, permits and approvals:

Our Research and Development

We consistently devote resources to R&D to achieve long-term growth. We believe the diversification and expansion of our product pipeline through both in-house R&D and external collaboration are critical to our long-term competitiveness and success.

We have a dedicated in-house R&D team of 69 employees in the PRC as of December 31, 2024. Our R&D department is comprised of the following departments: drug discovery, chemistry, manufacturing and control (“CMC”), clinical development, medical affairs and regulatory affairs. Our R&D employees possess significant expertise in molecular biology, chemistry regulatory affairs and clinical development. Through cross-functional collaboration, our R&D organization has enabled us to develop new drug products to address unmet clinical needs.

We employ a clinical-demand-oriented and market-driven approach to our R&D efforts. We first identify suitable drug development targets and carry out project evaluation and overall project design based on our development strategies and then explore and establish experimental methodology by coordinating across different experimental platforms. We carefully select drug development programs by balancing the commercial potential of each drug candidate and its likelihood of successful development, its potential competition, and the ultimate market size.

Drug Discovery

Our molecule screening and design capabilities increase the possibility of success of advancing molecules from preclinical studies to market, enable innovative therapeutic approaches and support rich pipeline assets built around key pathways and targets. We have built an efficient system to conduct target identification and validation, compound design and screen and lead compound optimization. During the discovery stage, drug candidates are tested for their absorption, distribution, metabolism, excretion and toxicological properties, and promising compounds are optimized through structure modification to achieve maximum efficacy and minimum toxicity. Our R&D centers support a targeted drug discovery and screening platform, which can efficiently complete target identification and validation, compound design and lead optimization.

During the drug discovery stage, we explore new R&D opportunities, conduct feasibility research and provide evaluation for the opportunities. We also design and prepare new chemical compounds, conduct systematic research related to the manufacturing process and quality management of the new drugs and develop technology platforms to support, manage and supervise the related technologies.

Chemistry, Manufacturing and Controls

CMC Group

The CMC group is a critical link between discovery and clinical study. It is responsible for developing chemical and pharmaceutical processes, so that drug substances can be made with the desired physical and chemical properties and formulated to achieve maximum bio availability and stability. During the CMC stage, the synthesis of each API molecule is investigated thoroughly to ensure that the drug substance can reach pre-determined quality standards, the manufacturing processes are safe, robust, economical and environmentally friendly and the drug products have good stability and suitable storage conditions and shelf life.

Clinical Development Group

Our clinical development team oversees clinical trials for drug development, sets up the procedural standard of clinical affairs and handles clinical medicine matters. Our clinical development team also focuses on clinical development strategy, clinical trial protocol design, clinical trial operation coordination, pharmacovigilance and clinical trial quality control. Our clinical development team members specialize in management of all stages of our clinical trials, including clinical trial design, implementation, drug supply and the collection and analysis of trial data. We collaborate with top clinical experts in various areas as our principal investigators, leverage the operational capabilities of industry leading clinical research organizations and rely on well-known academic medical institutions and clinical trial centers in the PRC and abroad to promote the high quality and efficient implementation of our clinical trials in the PRC.

Clinical Trial Design and Implementation

Our clinical development group manages all stages of clinical trials, including protocol design, operation and the collection and analysis of clinical data. Our rapid trial advancements are driven by (i) our strategic decision to initiate clinical phase trials with our outstanding preclinical results, (ii) rigorous trial design, (iii) long-term partnership with numerous hospitals and principal investigators from different regions and (iv) high-quality execution. Leveraging our extensive knowledge and experience in clinical trials, our clinical development experts identify unique therapeutic opportunities for our drug candidates based on the differentiating properties observed in clinical trials and improve clinical plans accordingly.

Competition

The organ fibrosis market is subject to rapid change. While we believe that our robust pipeline of innovative products and drug candidates, strong sales and marketing capability and experienced leadership team provide us with competitive advantages, we face potential competition from many different sources working to develop therapies targeting the same indications which our marketed drug or our drug candidates target. These include major pharmaceutical companies, specialty pharmaceutical and biotechnology companies of various sizes, academic institutions, government agencies and research institutions. Any drug candidates that we successfully develop and commercialize will compete both with existing drugs and with any new drugs that may become available in the future.

Our products primarily compete with products that are indicated for similar conditions on the basis of efficacy, price and general market acceptance by medical professionals and hospitals. The identities of our key competitors vary by product or drug candidate, and in certain cases, our competitors may have greater financial resources and expertise in R&D, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals and marketing approved drugs than we do.

We believe our continued success will primarily depend on our ability to develop innovative products and advanced technologies, apply technologies to all production lines, continuously develop an extensive product portfolio and pipeline, effectively commercialize and market our existing and future products, expand our distribution network and maintain customer relationships, attract and retain seasoned and talented technology development personnel, maintain high quality standards, maintain a highly efficient operational model and obtain and maintain regulatory approvals.

Production and Quality Control

In-House Manufacturing Facilities

Our manufacturing facilities are situated in Beijing and Cangzhou, Hebei province, in the PRC. During the years ended December 31, 2023 and 2024, 100% of pirfenidone we sold was manufactured at our Beijing and Cangzhou facilities. Our manufacturing facilities are designed and operated in compliance with cGMP regulations.

Quality Management

We believe that the product quality is fundamental to ensure the safety of patients and achieve our long-term development. Our quality management team monitors every stage of our operations in accordance with NMPA’s regulations. We implement quality management measures throughout our production process, including supplier examination, raw material inspection and testing and process control, and all products are thoroughly inspected and tested before release.

Procurement Quality Control

We have established internal procedures governing the selection for raw material suppliers and quality control to meet the requirements of relevant cGMP and pharmaceutical registration regulations. We select our raw material suppliers based on a variety of factors, including their economic status, capital, reputation, quality control management, production scale and technological strengths and evaluate them based on their qualification, feedback to our questionnaire and our on-site examination.

Logistics and Delivery Management

We have entered into logistics service agreements with third parties. Pursuant to the arrangement, logistics service providers provide delivery services in a safe and timely manner pursuant to our requirements, while we are responsible for the quality of goods. Our logistics service providers are responsible for any loss caused by their negligence during their provision of the logistics service, including transfer, loading, unloading, transportation and delivery. Our logistics service providers also liaise and handle the insurance aspects, while we arrange the payment of insurance premiums together with the freight charges.

Inventory Management

Our inventory principally consists of raw materials, work-in-progress, semi-finished goods (representing APIs) and finished products. We endeavor to maintain our inventory at a reasonable level that is sufficient to sustain our production without interruption. We enter into supply agreements with reference to our annual sales plan, manufacturing plan and procurement plan.

Sales, Marketing and Distribution

Our In-House Sales and Marketing Team

As of December 31, 2024, our in-house sales and marketing team had market coverage of 30 provinces, autonomous regions and municipalities in the PRC. Our sales and marketing team is primarily responsible for establishing and maintaining relationships with outlets in their covered regions.

We believe the relatively high level of medical knowledge and skill of our sales and marketing team are important to the implementation of our academic marketing approach and maintenance of our reputation as a leading pharmaceuticals company. As of December 31, 2024, our in-house sales and marketing team included 368 employees, with an average of more than ten years of experience in pharmaceutical sales. Our more experienced staff also share their academic promotion networking experience on a regular basis.

For more details regarding the qualifications of our employees, see “—Employees in the PRC” in this section.

Academic Promotion

We emphasize academic promotion and patient service in our sales and marketing efforts. We strive to promote and strengthen our academic recognition and brand awareness among medical experts by educating doctors and other medical professionals on ETUARY, our other product candidates and their respective indications. We believe that our working relationships with medical experts help to raise our profile, enhance awareness of ETUARY in the medical community and among patients, increase the clinical capabilities of healthcare providers and provide us with valuable clinical data to improve ETUARY, all of which help us more effectively market and sell ETUARY.

Distribution

Distributors are our direct customers and they resell our products to the outlets, including hospitals, other medical institutions and pharmacies. Distributors are primarily responsible for the delivery of products and their payments, while our in-house sales and marketing team is responsible for conducting academic marketing activities and other promotional efforts.

From time to time, we have terminated or opted to not renew our collaboration relationships with certain distributors due to consolidation of distribution channels and unstable business management of the distributors. At the same time, we add new distributors primarily as a result of the continued expansion and optimization of our sales network. In general, our relationships with our major distributors have remained stable.

Product Pricing

We take into account a number of factors in determining our prices, which primarily includes our R&D, production and marketing costs and expenses, the perceived value of products, our market share and the competitive landscape. In addition, our pricing strategies are also affected by the regulations and policies imposed on the pharmaceutical industry, including medical insurance reimbursement standards and regulation of medical and pricing practices. Our commercialization team closely monitors new policies affecting the pricing of pharmaceutical products in the PRC and keeps updating our pricing strategies to navigate in the evolving regulatory environment and cope with local policies and competition in different provinces, with the goal of maintaining the price levels of our products and maximizing our overall sales in the PRC. For details, see “—Our Operations in the PRC: Gyre Pharmaceuticals—Regulatory Requirements in the PRC—Other PRC Regulations in Relation to the Pharmaceutical Industry—Price Controls”.

National Reimbursement Drug List

Participants in the national public medical insurance program are eligible for full or partial reimbursement of the purchase price of drugs included in the NRDL, which sets forth the payment standard for drugs under the basic medical insurance, work-related injury insurance and maternity insurance funds. The PRC government started to regularly adjust the NRDL since 2017 and ETUARY successfully entered into the NRDL within the same year. The latest version of the NRDL has been implemented from January 1, 2025. For further details, see “—Our Operations in the PRC: Gyre Pharmaceuticals—Regulatory Requirements in the PRC—Regulations Relating to the Development, Manufacture and Sale of Pharmaceuticals— National Medical Insurance, its Reimbursement Standards and the NRDL."

Two-Invoice System

On December 26, 2016, the Healthcare Reform Committee of the State Council of the PRC, the former National Health and Family Planning Commission (the “NHFC”), the National Development and Reform Commission of the PRC and other relevant PRC government authorities jointly issued the Circular on Issuing the Implementing Opinions on Carrying out the Two-Invoice System for Drug Procurement among Public Medical Institutions (for trial implementation), which provides detailed rules regarding the implementation of the Two-Invoice System at a national level. For details, see “—Our Operations in the PRC: Gyre Pharmaceuticals—Regulatory Requirements in the PRC—Regulations Relating to the Development, Manufacture and Sale of Pharmaceuticals—Drug Distribution and Two-Invoice System”. To comply with these relevant regulations, we primarily adopt the single-layer distribution model with distributors who directly on-sell our products to hospitals and public medical institutions. Certain distributors may engage sub-distributors for the sales to pharmacies, which were not subject to the regime of the Two-Invoice System.

Centralized Tender Process and Centralized Volume-Based Procurement System

Prices of most pharmaceutical products in the PRC sold to public hospitals and public medical institutions are determined through a competitive centralized tender process at the provincial or municipal level with varying terms and procedures. In the centralized tender process, the winning pharmaceutical production companies will be allowed to sell their products to public hospitals and other public medical institutions at the bid prices. The centralized tender process can create pricing pressure among substitute products or products that are perceived by the market to be substitute products and resulted in significant change in how drugs are priced and procured in the PRC.

Raw Materials and Suppliers

In addition to the suppliers in our “Qualified Supplier Directory,” each of our significant raw material suppliers have backup suppliers. In addition, each material has more than one manufacturer, and each manufacturer has multiple distributors. These distributors have reasonable inventory reserves. If we need to find a new supplier, we conduct comparative research and, after confirming, the supplier is added to our Qualified Supplier Directory to ensure product supply.

Government Regulations in the PRC

Government authorities in the PRC extensively regulate, among other things, the research, development, testing, product approval, manufacture, quality control, manufacturing changes, packaging, storage, recordkeeping, labeling, promotion, advertising, sales, distribution, marketing, and import and export of drugs and biologic products. Our current product candidates are expected to be regulated as drugs. The processes for obtaining regulatory approval in the PRC, along with compliance with applicable statutes and regulations and other regulatory authorities both pre- and post-commercialization, are a significant factor in the production and marketing of our products and our R&D activities and require the expenditure of substantial time and financial resources.

Principal Regulatory Authorities

The primary drug regulatory bodies in the PRC include the Standing Committee of the National People’s Congress, the State Council and several ministries and agencies under the State Council’s authority including, among others, the NMPA, the predecessor of which is the China Food and Drug Administration (“CFDA”), the National Health Commission (the “NHC”), the predecessor of which is the NHFC, and the National Healthcare Security Administration (the “NHSA”).

The NMPA is a regulatory authority responsible for registration and supervision of pharmaceutical products, cosmetics and medical equipment under the supervision of State Administration for Market Regulation (“SAMR”).

The NHC is the chief healthcare regulator of the PRC, and is primarily responsible for drafting national healthcare policy, regulating public health, medical services and the health contingency system of the PRC, coordinating healthcare reform in the PRC and overseeing the operation of medical institutions and practicing of medical personnel in the PRC.

The NHSA is responsible for drafting and implementing policies, plans and standards of medical insurance, maternity insurance and medical assistance, administering the PRC’s healthcare fund, formulating a uniform medical insurance catalogue and payment standards for drugs, regulating medical disposables and healthcare services, and formulating and administering the bidding and tendering policies for drugs and medical disposables.

Regulations Relating to the Development, Manufacture and Sale of Pharmaceuticals

Pharmaceutical Product Development

In the PRC, the NMPA monitors and supervises the administration of pharmaceutical products, as well as medical devices and equipment. The local provincial medical products administrative authorities in the PRC are responsible for the supervision and administration of drugs within their respective administrative regions. According to the PRC Drug Administration Law (the “Drug Administration Law”), drugs refer to articles which are used in the prevention, treatment and diagnosis of human diseases and intended for the regulation of the physiological functions of human beings, for which indications or functions, usage and dosage are specified, including traditional Chinese drugs, chemical drugs and biological products. The Drug Administration Law and the Implementing Regulations of the PRC Drug Administration Law have established the legal framework for the administration of pharmaceutical products and applies to entities and individuals engaged in the research, production, trade, application, supervision and administration of pharmaceutical products.

Non-Clinical Research and Animal Testing

The State Administration for Market Regulation requires preclinical data to support registration applications for imported and domestic drugs. Pursuant to the Administrative Measures for Certification of Good Laboratory Practice for Non-clinical Laboratory Studies, the NMPA is responsible for the certification of non-clinical research institutions across the PRC and the provincial counterparts of the NMPA are in charge of the daily supervision of non-clinical research institutions in the PRC. The NMPA decides whether an institution is qualified for undertaking pharmaceutical non-clinical research by evaluating such institution’s organizational administration, research personnel, equipment and facilities and operation and management of non-clinical pharmaceutical projects. A GLP Certification will be issued by the NMPA if all the relevant requirements are satisfied, which will also be published on the NMPA’s website, and the validity of such certification is five years.

The Administrative Regulations on Laboratory Animals, the Administrative Measures on Good Practice of Experimental Animals and the Administrative Measures on the Certificate for Laboratory Animals (for Trial Implementation) stipulate that permits shall be obtained for the use and breeding of laboratory animals and performing experimentation on animals.

Approval and Reform for Clinical Trials of New Drugs

Under the Administrative Measures for Drug Registration, the Drug Administration Law and the Implementing Regulations of the PRC Drug Administration Law, new drug applications are subject to clinical trials. The NMPA has taken a number of steps to increase efficiency for approving clinical trial applications and has also significantly increased monitoring and enforcement of the Good Clinical Practice for Drug Trials (the “PRC’s GCP”), to ensure data integrity.

The Administrative Measures for Drug Registration confirms a number of reform actions, including but not limited to: (i) the full implementation of marketing authorization holder system and implied approval of the commencement of clinical trials; (ii) implementing associated review of drugs, excipients and packaging materials; and (iii) introducing procedures for expedited registration of drugs. Upon completion of nonclinical research, clinical trials must be conducted for the application of a new drug registration and applicants must apply for approval of IND from the NMPA, or the CDE before conducting clinical trials.

The Opinions of the State Council on the Reform of Evaluation and Approval System for Drugs and Medical Devices, established a framework for reforming the evaluation and approval system for drugs and medical devices.

The Announcement on Several Policies on the Evaluation and Approval of Drug Registration further simplifies the evaluation and approval process of drug registrations and provides that the application process of an IND is subject to a one-off umbrella approval procedure, rather than a by-stage approval procedure. According to the Announcement on Adjusting Evaluation and Approval Procedures for Clinical Trials for Drugs, within 60 days after the acceptance of the application of the IND and the payment of the associated fees, the applicant may conduct clinical trials for the drug in accordance with the clinical trial protocol submitted, if the applicant has not received any negative or questioning opinion from the CDE.

The Priority Review and Approval Procedures for Drug Marketing Authorizations (for Trial Implementation) further clarifies that a fast-track mechanism for the review and approval during the drug registration process can be available to innovative drugs that meet certain criteria.

Regarding International Multi-Center Clinical Trials

Pursuant to the International Multi-Center Clinical Trial Guidelines (for Trial Implementation), promulgated by the NMPA, international multi-center clinical trial applicants may simultaneously perform clinical trials in different centers using the same clinical trial protocol. Where the applicants plan to implement international multi-center clinical trials in the PRC, the applicants must comply with the Drug Administration Law, the

Implementing Regulations of the PRC Drug Administration Law and the Administrative Measures for Drug Registration. Additionally, applicants must abide by the GCP, make reference to universal international principles such as the ICH-GCP and comply with the laws and regulations of the countries involved in the international multi-center clinical trials. Where the applicants plan to use the data derived from the international multi-center clinical trials for approval of a drug registration in the PRC, the application must involve at least two countries, including the PRC, and must satisfy the requirements for clinical trials set forth in the International Multi-Center Clinical Trial Guidelines (for Trial Implementation) and the Administrative Measures for Drug Registration and other related laws and regulations.

Drug Clinical Trial Registration

According to the Administrative Measures for Drug Registration, upon obtaining the approval of the relevant IND, the applicant must, prior to conducting the clinical trial of drugs, register on the registration and information announcement platform for clinical trials of drugs, information regarding the scheme of the clinical trial.

Pursuant to the Announcement on Drug Clinical Trial Information Platform, all clinical trials approved by the NMPA and conducted in the PRC must complete a clinical trial registration and publish trial information through the Drug Clinical Trial Information Platform. The applicant must complete the trial pre-registration within one month after obtaining the approval of the IND in order to obtain the trial’s unique registration number and complete registration of certain follow-up information before the first subject’s enrolment in the trial. If the registration is not completed within one year after the approval of the IND, the applicant must submit an explanation and if applicant’s first submission is not completed within three years, the approval of the IND will automatically expire.

Phases of Clinical Trials and Communication with the CDE

According to the Administrative Measures for Drug Registration, a clinical trial consists of Phase 1, 2, 3 and 4 trials and a bioequivalence trial. In addition to the characteristics of a drug and the research purpose, the research contents must also include clinical pharmacological research, exploratory clinical trial, confirmatory clinical trial and post-marketing research under the Administrative Measures for Drug Registration.

Pursuant to the Administrative Measures for Communication on Drug Research, Development and Technical Reviews, during the R&D periods and in the registration applications of the innovative new drugs (among others), the applicants may propose to conduct communication meetings with the CDE. The communication meetings can be classified into three types. Type I meetings are convened to address key safety issues in clinical trials of drugs and key technical issues in the R&D of breakthrough therapeutic drugs. Type II meetings are held during the key R&D periods of drugs, and mainly include meetings before the IND application, meetings upon the completion of phase 2 trials and before the commencement of phase 3 trials, meetings before submitting a marketing application for a new drug and meetings for risk evaluation and control. Type III meetings refer to meetings not classified as Type I or Type II.

Sampling and Collecting Human Genetic Resources

The Administrative Regulations on Human Genetic Resources of the PRC stipulates that, in order to obtain marketing authorization for relevant drugs and medical devices in the PRC, no approval is required in international clinical trial cooperation using the PRC’s human genetic resources at clinical institutions without export of human genetic resource materials. However, the participating entities must file the type, quantity and usage of the human genetic resource to be used with the NHC before clinical trials commence.

On June 1, 2023, The Ministry of Science and Technology of the PRC promulgated the Implementation Rules for the Administrative Regulation on Human Genetic Resources (the “HGR Implementation Rules”), which came into effect on July 1, 2023. The HGR Implementation Rules have refined the Administrative Regulations on Human Genetic Resources, including, but not limited to, refining the definition of “human genetic resources information”, clarifying the identification standard of “foreign entities”, adjusting the scope of collection approval, and adjusting and improving the approval procedures for international cooperative scientific research and administrative supervision rules.

Registration of Drug Marketing

According to the Administrative Measures for Drug Registration, an applicant must complete studies in pharmacy, pharmacology and toxicology, as well as all phases of clinical trials before submitting the application for registration for marketing authorization. The applicant must submit an application for drug marketing authorization and the relevant research materials in accordance with the submission requirements after determining quality standards, verifying commercial scale manufacturing process and preparing to undergo examination and inspection for drug registration. Once an application is submitted, the CDE will form a group of pharmacists, medical professionals and other technical specialists to analyze the drug’s safety, effectiveness and quality control. After the comprehensive review, if the drug is approved for marketing, a drug registration certificate shall be issued.

Marketing Authorization Holder System

Pursuant to the Drug Administration Law, a drug marketing authorization holder system is implemented for drug management. The drug marketing authorization holder is an enterprise or a drug development institution that has obtained the drug registration certificate and is responsible for non-clinical research, clinical trials, production and operation, post-marketing research, adverse reaction monitoring, reporting and processing of drugs in accordance with the provisions of the Drug Administration Law.

Under the Circular on the Matters Relating to Promotion of the Pilot Program for the Drug Marketing Authorization Holder System (the “Circular on Drug Marketing Authorization Holder System”), the drug marketing authorization holder must establish a drug quality assurance system and be equipped with special personnel to take charge of quality management on drugs independently. Additionally, the drug marketing authorization holder must regularly review the quality management system of the drug manufacturer and the drug distributor and supervise its continuous quality assurance and control capabilities. A drug marketing authorization holder who manufactures drugs on its own shall obtain a drug production license in accordance with the Circular on Drug Marketing Authorization Holder System and entrust a qualified drug manufacturer. The drug regulatory authority of the State Council has formulated guidelines for the quality of pharmaceuticals entrusted manufacturing, to guide and supervise the drug marketing authorization holder and the entrusted manufacturer to fulfill their drug quality assurance obligations. The Announcement of the State Drug Administration on Strengthening the Supervision and Administration on Entrusted Manufacturing by the Drug Marketing Authorization Holder, which came into effect on October 17, 2023, reiterates the importance of supervision over entrusted manufacturing and stipulates more stringent and detailed requirements on aspects of license, quality and supervision of the entrusted manufacturing of the drug marketing authorization holder.

Drugs’ Registration Classification

Under the Administrative Measures for Drug Registration, drugs are classified into traditional Chinese drugs, chemical drugs, biological products and others. According to the Announcement on the Issuance of the Reform Plan for the Registration Classification of Chemical Drugs, the registration classification of the chemical drugs are adjusted to five categories. Category 1 drugs refer to innovative chemical drugs that have not been marketed anywhere in the world. Improved new chemical drugs that are not marketed anywhere in the world fall into Category 2 drugs. Generic chemical drugs that have equivalent quality and efficacy to the originator’s drugs that have been marketed abroad but not yet in the PRC are classified as Category 3 drugs. Generic drugs that have equivalent quality and efficacy to the originator’s drugs and have been marketed in the PRC fall into Category 4 drugs. Category 5 drugs are drugs which have already been marketed abroad, but are not yet approved in the PRC. Category 1 and 2 drugs must follow the registration application procedure for new drugs according to the Administrative Measures for Drug Registration; Category 3 and 4 drugs must follow the procedure for generic drugs; and Category 5 drugs must follow the application and regulation requirements for importing drugs.

According to the Chemical Drug Registration Classification and Application Data Requirements, innovative chemical drugs and improved new chemical drugs are categorized as Category 5.1 drugs, while generic chemical drugs, all of which shall have been already marketed abroad but not yet approved in the PRC are categorized as Category 5.2 drugs.

Special Examination and Fast Track Approval for Drugs Targeting Rare Diseases

Pursuant to the Circular on Publishing the Procedures of Developing the Rare Disease List, the following four criteria must be met at the same time for rare disease designation: (i) the disease has a low incidence or prevalence in PRC and abroad; (ii) the disease significantly impacts the patient and his or her family; (iii) there is a clear diagnosis method; and (iv) the disease can be treated or intervened in an economically feasible way, or it has been included in a national scientific research project if there is no effective treatment or intervention for such disease. With certain drugs targeting rare diseases being listed in National Rare Disease List, a company may be eligible for the priority review and approval of new drugs for these diseases from the NMPA.

According to the Administrative Provisions on Special Examination and Approval of the Registration of New Drugs, special examination and approval for new drugs registration applications applies when (i) the effective constituent of a drug extracted from plants, animals and minerals, as well as the preparations thereof, have never been marketed in the PRC and the material medicines and the preparations thereof are newly discovered; (ii) the chemical raw materials for medicines as well as the preparations thereof and the biological product have not been approved for marketing, either in the PRC or aboard; (iii) new drugs with distinctive clinical treatment advantages for diseases such as AIDS, malignant tumor or other rare diseases; or (iv) new drugs for diseases that currently lacking effective treatment.

According to the Opinions of the State Council on the Reform of Evaluation and Approval System of Drugs and Medical Devices, a special evaluation and approval system shall be adopted for innovative drugs to accelerate the evaluation and approval process for innovative drugs for prevention and treatment of AIDS, cancer, major infectious diseases, rare diseases and other diseases.

According to the Announcement of the State Drug Administration and the NHC on Optimizing the Evaluation and Approval of Drug Registration, the CDE will prioritize the allocation of resources for review, inspection, examination and approval of registration applications that have been included in the scope of priority evaluation and approval.

Good Manufacturing Practices

Pursuant to the Drug Administration Law, drug manufacturers shall comply with the GMP and establish a sound GMP management system, to ensure that the entire process of drug manufacturing is maintained to meet the statutory requirements and the GMP requirements enacted by the NMPA and in accordance with the Drug Administration Law. The legal representative of and principal person in charge of a drug manufacturer are fully responsible for the drug manufacturing activities.

The Good Manufacturing Practice for Drugs provided guidance for, among others, the quality management, organization and staffing, production premises and facilities, equipment, material and products, recognition and inspection, documentation maintenance, manufacture management, quality control and quality assurance, contractual manufacture and contractual inspection for the products, product delivery and recalls of a manufacturer.

Drug Manufacturing Permit

Under the Administrative Measures for the Supervision of Drug Manufacturing promulgated by SAMR, persons engaging in drug manufacturing activities shall be subject to approval by the provincial counterparts of the NMPA where the persons engaging in pharmaceutical manufacturing activities are located, obtain a drug manufacturing permit pursuant to these measures, comply strictly with the pharmaceutical manufacturing quality control rules and ensure that the manufacturing process complies with statutory requirements at all times. The period of validity of a drug manufacturing permit is five years. In the event the permit holder needs to continue to manufacture drugs upon the expiration of the permit, the holder shall apply to the original issuing authorities for reissuance six months before the expiration date of the permit.

Drug Business Permit and Good Supply Practice Requirements

According to Drug Administration Law and the Implementing Regulations of the PRC Drug Administration Law, before engaging in the wholesale distribution and/or retailing of drugs, the relevant entity must obtain a drug business permit with an appropriate scope of distribution from the local counterpart of the NMPA and comply with the Good Supply Practice for Drugs. Under the Measures for the Supervision and Administration of Drug Quality in Trading and Usage, which became effective on January 1, 2024, a drug business permit is valid for five years. Each holder of the drug business permit must apply for an extension of its permit during the period from two months to six months prior to expiration. Otherwise, the holder shall cease its trading activities upon expiration until another drug business permit is granted.

Drug Recall

According to the Administrative Measures for Drug Recalls, the term “drug recalls” refers to the activities of a drug marketing authorization holder to recall drugs that have been marketed, but have quality problems or other potential safety hazards under the prescribed procedures and take corresponding measures to timely control risks and eliminate potential hazards. The term “quality problems or other potential safety hazards” refers to non-compliance of drugs with statutory requirements, or other unreasonable risks that may endanger human health and life safety caused by drugs due to R&D, production, storage and transportation, labeling and other reasons.

Administrative Protection and Monitoring Periods for New Drugs

Pursuant to the Implementing Regulations of the PRC Drug Administration Law, based on the needs for protection of public health, the NMPA may set an observation period of not more than five years for new drugs produced by drug manufacturers; and no approval shall be given to any other manufacturers to produce or import the said drugs during the observation period.

Packaging of Pharmaceutical Products

Pursuant to the Drug Administration Law, the packaging of drugs must include a label and an instruction. According to the Administrative Measures for the Packaging of Drugs, the packaging of drugs must comply with national and professional standards. Drugs with packaging that does not meet the relevant standards cannot be sold or marketed in the PRC (except for drugs for the military). According to the PRC’s GCP, the packaging labels of the investigational drugs must indicate that the drug is for clinical trial use only, and must provide information related to the clinical trial and the drug used in the trial. The packaging shall also ensure the maintenance of blind states in blind trials.

Insert Sheet and Labels of Drugs

Pursuant to Administrative Provisions for Drug Insert Sheets and Labels, the insert sheets and labels of drugs should be reviewed and approved by the NMPA. A drug insert sheet should include the important scientific data, conclusions and information concerning drug safety and efficacy in order to direct the safe and reasonable use of drugs. The inner label of a drug should bear such information as the drug’s name, indication or function, strength, dose and usage, production date, batch number, expiry date and drug manufacturer, and the outer label of a drug should indicate such information as the drug’s name, ingredients, description, indication or function, strength, dose and usage, adverse reaction, contraindications, precautions, storage, production date, batch number, expiry date, approval number and drug manufacturer.

Advertising for Drugs

Pursuant to the Interim Administrative Measures for the Review of Advertisements for Drugs, Medical Devices, Dietary Supplements and Foods for Special Medical Purpose, the contents of a drug advertisement must be based on the drug instructions approved by the NMPA. Where a drug advertisement involves drug name, indications or major functions and pharmacological effects, the drug advertisement shall not go beyond the scope of instructions and must state contraindications and adverse reactions in a prominent position. Prescription drug advertisements must also state that “the advertisement is meant to be read only by medical and pharmaceutical professionals” in a prominent position and OTC drug advertisements must also add the non-prescription drug label (OTC) in a prominent place and state that “please purchase and use the drugs in accordance with the drug instructions or under the guidance of a pharmacist” in a prominent position.

Drug Technology Transfer

Drug technology transfer refers to the transfer of drug production technology by its owner to a drug manufacturer and the application for drug registration by the drug manufacturer pursuant to the Administrative Provisions for Registration of Drug Technology Transfer. The NMPA promulgated the Administrative Provisions for Registration of Drug Technology Transfer, to standardize the registration process of drug technology transfer, which includes application for, evaluation, review, approval and supervision of drug technology transfer registration. An application for drug technology transfer must be submitted to the provincial counterparts of the NMPA for review and approval. Eligible applications will receive a letter of approval and a drug approval number for the supplementary application.

Online Drug Information Services

According to the Administrative Measures for Internet-based Drug Information Service, the operational internet drug information service refers to the activities of providing information on drugs (including medical devices) through the internet. Where any website intends to provide internet drug information services, the website must file an application with the local provincial counterparts of NMPA and will be subject to the examination and approval thereof for obtaining the qualifications for providing internet drug information services. The validity term for a Qualification Certificate for Internet Drug Information Services is five years and may be renewed at least six months prior to its expiration date upon a re-examination by the relevant authority.

National Medical Insurance, its Reimbursement Standards and the NRDL

According to the Decision of the State Council on Establishing the Urban Employees’ Basic Medical Insurance System, Opinions on the Establishment of the New Rural Cooperative Medical Insurance System, the Guiding Opinions of the State Council about the Pilot Urban Resident Basic Medical Insurance and the Opinions of the State Council on Integrating the Basic Medical Insurance Systems for Urban and Rural Residents, medical insurance would be available to all employees and residents in both rural and urban areas in the PRC.

According to the Notice of Opinion on the Diagnosis and Treatment Management, Scope and Payment Standards of Medical Service Facilities Covered by the National Urban Employees Basic Medical Insurance Scheme, the basic medical insurance scheme would cover a portion of the costs of diagnostic and treatment devices, as well as diagnostic testing. The scope and rate of reimbursement are determined by provincial policies.

The major aim of the Guidance on Further Deepening the Reform of the Payment Method of Basic Medical Insurance released by the General Office of the State Council is to develop a diverse reimbursement mechanism that includes diagnosis-related groups, per-capita caps and per-bed-day caps. These new reimbursement systems have been implemented across the country, replacing the previous reimbursement method, which is based on service category and product price.

Pursuant to the Interim Measures for the Scope of Basic Medical Insurance Coverage for Drugs for Urban Employees, which set the standard for the drugs to be included in the NRDL, a drug must be clinically necessary, safe, effective, reasonably priced, easy to use, available in sufficient quantity to be included in the NRDL, and must meet one of the following requirements: (i) be set forth in the pharmacopoeia of the PRC, (ii) satisfy the standards promulgated by the NMPA and (iii) be approved by the NMPA as imported drugs.

The Ministry of Labor and Social Security of the PRC, together with other government authorities, has the power to determine the drugs included in the NRDL. The Western medicine and Chinese patent medicine included in the National Medical Insurance Catalog are divided into two parts, Part A and Part B. Provincial governments are required to include all Part A and Part B medicines listed on the National Medical Insurance Catalog in their provincial Medical Insurance Catalog in the National Medical Insurance Catalog. Fees incurred for the use of Part A medicines are entitled to reimbursement in accordance with the regulations in respect of basic medical insurance. Fees incurred by the use of Part B are shared by the patient and basic medical insurance. The percentage of reimbursement by basic medical insurance for Part B medicines is stipulated by local authorities and in result may differs from region to region in the PRC.

Price Controls

The Drug Administration Law requires that, for drugs subject to market-determined prices, the relevant marketing authorization holders, manufacturers and distributors of drugs and medical institutions shall determine the price applying the principles of fairness, reasonableness, good faith and consistency between quality and prices. Marketing authorization holders, manufacturers and distributors of drugs and medical institutions must comply with the price management rules for drugs of the relevant competent authorities to determine the prices of drugs and are prohibited from making exorbitant profits, conducting price monopoly and price fraud, among others.

According to PRC Price Law, prices of most commodities and services are market-adjusted prices and prices of a very small number of commodities and services are government- guided prices or government-set prices. The prices of drugs are mainly determined by market competition. Instead of direct governmental price controls, the government primarily regulates prices by establishing a centralized procurement mechanism, revising medical insurance reimbursement standards and strengthening regulation of medical and pricing practices.

The Opinions on Effectively Implementing Current Drug Price Administration issued by the NHSA seek to further improve the drug pricing formation mechanism and emphasizes the market-oriented drug pricing mechanism. Although narcotic drugs and category I psychotropic drugs are subject to government-guided prices, other drugs are subject to market-determined prices. Meanwhile, the national and provincial medical security departments may implement or delegate third parties to implement price cost investigation on drug suppliers and the results can be used as the basis for determining whether the drugs were sold at unfair prices.

Drug Distribution and Two-Invoice System

The Implementation Opinions on Promoting the “Two-Invoice System” for Drug Procurement by Public Medical Institutions (For Trial Implementation) (the “Two-Invoice System Notice”) establishes a system requiring the issuance of only two invoices during the distribution of drugs in other words, in the whole drug procurement process, there should be only one layer of pharmaceutical distributor between the drug manufacturer and the procuring public medical institution. The Two-Invoice System prohibits the sale of drugs through a chain of distributors which will, as a result, increase the price of drugs paid by the public medical institutions. The

Two-Invoice System was firstly promoted in pilot areas, and has been implemented nationwide by 2018. Drug manufacturers and distributors must comply with the Two-Invoice System in order to engage in procurement processes with public hospitals.

Regulations Relating to Work Safety

The PRC Work Safety Law applies to all entities engaged in production and business activities in the PRC. Such entities shall, according to the PRC Work Safety Law, strengthen work safety management, establish and improve an all-staff work safety responsibility system and internal rules and regulations in relation to work safety, increase investment in funds, materials, technologies and staff for work safety, improve working conditions, strengthen the development of a standardized, information technology- enabled work safety system, establish a dual prevention mechanism for managing safety risks and addressing hidden dangers, and improve risk prevention and resolution mechanism to ensure work safety. Violations of the PRC Work Safety Law may result in administrative penalties such as fine, suspension of operation and revocation of license.

Regulations Relating to Intellectual Property Rights

Patents

Pursuant to the PRC Patent Law and the Implementation Regulations of the PRC Patent Law, an invention-creation shall mean an invention, utility model or design. Inventions and utility models for which patent rights are granted and an invention-creation must possess novelty, creativity and practicality. The Patent Office under the China National Intellectual Property Administration is responsible for receiving, examining and approving patent applications. The protection period is 20 years for an invention patent, 10 years for a utility model patent and 15 years for a design patent, commencing from such patent’s application date. Any patentee or interested party may file a lawsuit with a people’s court against any individual or entity that utilizes a patent or conducts any other activity that infringes a patent without the patent holder’s authorization, and may request regulatory authorities to order the infringer to stop the infringement act forthwith or impose a fine on the infringer. If the patent infringement is found to constitute a crime, the patent infringer shall be held criminally liable in accordance with applicable laws. According to the PRC Patent Law, for public health purposes, the China National Intellectual Property Administration may grant a compulsory license for manufacturing patented drugs and exporting them to countries or regions covered under relevant international treaties to which PRC has acceded. In addition, according to the PRC Patent Law, any organization or individual that applies for a patent in a foreign country for an invention or utility model patent established in the PRC is required to report to China National Intellectual Property Administration for confidentiality examination.

Trademarks

Pursuant to the PRC Trademark Law and the Implementation Regulations of the PRC Trademark Law, the validity period of registered trademarks is 10 years, calculated from the date of approval of the registration. A trademark registrant intending to continue to use the registered trademark upon expiry of the period of validity must undergo the renewal formalities within 12 months before expiry according to the relevant provisions. If it fails to do so, the trademark registrant may be granted a six-month grace period. The period of validity of each renewal is 10 years, commencing from the day after the expiry date of the last period of validity. If the renewal formalities are not satisfied within the grace period, the registration of the trademark is canceled.

Copyright

According to the PRC Copyright Law, works protected by copyright refer to original intellectual achievements in the fields of literature, art and science which can be expressed in a certain form, including: (i) written works; (ii) oral works; (iii) musical, dramatic, opera, dance, and acrobatic artistic works; (iv) fine arts and architectural works; (v) photographic works; (vi) audio-visual works; (vii) graphic works and model works, such as engineering design plans, product design plans, maps, and schematic diagrams; (viii) computer software; and

(ix) any other intellectual achievements which share the same characteristics of the aforementioned works. Copyright is a collection of personal and property rights, which, among others, includes the right of publication, the right of authorship, the right of modification, the right of distribution, the right of reproduction, and the right of internet information transmission.

According to the Measures for the Registration of Computer Software Copyright, and the Regulations on Computer Software Protection, the National Copyright Administration of the PRC shall be the competent authority for the nationwide administration of software copyright registration, and the Copyright Protection Centre of China is designated as the authority responsible for the whole registration process of computer software. The Copyright Protection Centre of China issues registration certificates to applicants for computer software copyrights that comply with the aforementioned measures and regulations.

Domain Names

Domain names are protected under the Administrative Measures on Internet Domain Names promulgated by the Ministry of Industry and Information Technology (the “MIIT”) and Implementing Rules on Registration of China Country Code Top-level Domain Names issued by China Internet Network Information Center. The MIIT is the regulatory body responsible for the administration of PRC internet domain names. Prior to the establishment of domain name root servers, domain name root server operation institutions, domain name registration management institutions and domain name registration service institutions within the PRC, the corresponding permits shall be obtained from the MIIT or its local counterparts. The China Internet Network Information Center is responsible for the administration of registration of China country code top-level domain names.

Trade Secrets

According to the PRC Anti-Unfair Competition Law and Provisions of the Supreme People’s Court on Several Issues Concerning the Application of Law in the Trial of Civil Cases Involving Trade Secret Infringement, the term “trade secrets” refers to technical and business information that is unknown to the public, has utility, may create business interests or profits for its legal owners or holders and is maintained as a secret by its legal owners or holders. Under the PRC Anti-Unfair Competition Law, business operators are prohibited from infringing others’ trade secrets by: (i) acquiring a trade secret from its holder by theft, bribery, fraud, coercion, electronic intrusion or any other illicit means; (ii) disclosing, using or allowing another person to use a trade secret acquired from the right holder by any means as specified in clause (i); (iii) disclosing, using or allowing another person to use a trade secret in its possession, in violation of its confidentiality obligation or the requirements of the right holder for keeping the trade secret confidential; and (4) abetting a person, or tempting or aiding a person into or in acquiring, disclosing, using or allowing another person to use the trade secret of its holder in violation of his or her non-disclosure obligation or the requirements of the right holder for keeping the trade secret confidential.

Regulations Relating to Environmental Protection

According to the PRC Environmental Protection Law, the Administrative Regulations on the Environmental Protection of Construction Project, the PRC Environmental Impact Assessment Law and PRC Law on the Prevention and Control of Environment Pollution Caused by Solid Wastes, an enterprise, which causes environmental pollution and discharges other materials that endanger the public, must implement environmental protection methods and procedures into its business operations. Where effects may be exerted on the environment after the completion of construction projects, the construction enterprise must submit an environmental impact report (form) or environmental impact registration form to the relevant environmental protection authority. Any project that is required to prepare the environmental impact report (form) in accordance with the law must obtain the approval from the relevant environmental protection department for its environmental impact assessment documents; otherwise, construction on the project may not begin. Pursuant to the Administrative Measures for Pollutant Discharge Permit and the Regulations on the

Administration of Pollutant Discharge Permit, a pollutant-discharging entity must legally obtain a pollutant discharge permit prior to discharging any pollutants, and shall discharge pollutants in compliance within the scope specified in the pollutant discharge permit. A pollutant discharge permit is valid for five years from the date of issuance.

Pursuant to the Notice of the General Office of the State Council on Issuing the Implementation Plan for the Permit System for Controlling the Discharge of Pollutant Emission and the Classification Administration List of Pollutant Discharge Permitting for Fixed Pollution Sources (2019 Version), the state implements a focused management, a simplification management and a registration management of emission permits based on the pollutant discharging enterprises and other manufacturing businesses’ amount of pollutants, emissions and the extent of environmental damage. The manufacturing of chemical drug substance is strictly regulated under the current regulatory framework, and the manufacturer shall obtain a pollutant discharge permit in accordance with the prescribed time limit.

Hazardous Chemicals

Regulations on Safety Administration of Hazardous Chemicals, provides regulatory requirements on the safe production, storage, use, operation and transportation of hazardous chemicals. The PRC government exerts strict control over implementing overall planning and rational layout for the production and storage of hazardous chemicals and exam safety conditions of construction project concerning manufacturing or storing hazardous chemicals. An enterprise that manufactures and stores hazardous chemicals is required to appoint a qualified institution to conduct safety evaluations of its safety production conditions once every three years and to prepare a safety evaluation report.

According to the Administrative Measures for the Registration of Hazardous Chemicals, the state adopts a registration system for hazardous chemicals. The registration of hazardous chemicals is subject to the principles of application by enterprises, two-level review, unified issuance of certificates and hierarchical administration. Where any registering enterprise fails to go through the registration formalities for hazardous chemicals or fails to go through the formalities for altering the registration contents of hazardous chemicals when the type of registration changes or the hazardous chemicals it manufactures or imports have new hazardous characteristics, the registering enterprise must make corrections and may be subject to a fine of not more than 50,000 yuan. If the registering enterprise refuses to make corrections, it shall be given a fine of not less than 50,000 yuan but not more than 100,000 yuan. If the circumstance is serious, the registering enterprise will be ordered to suspend production and business for rectification.

Product Quality

Pursuant to the PRC Product Quality Law of the PRC, manufacturers shall be liable for the quality of products they produce and guarantee that the product quality meets the requirements stipulated by laws and shall not mix impurities or imitations into products, pass fake goods off as genuine ones or shoddy products as good ones or sub-standard products as standard ones. Sellers are required to take measures to ensure the quality of the products sold by them. The manufacturer shall be liable to compensate for any bodily injuries or damage to property other than the defective product itself resulting from the defects in the product, unless the manufacturer is able to prove that: (1) the product has never been circulated; (2) the defects causing injuries or damage did not exist at the time when the product was circulated; or (3) the science and technology at the time when the product was circulated were at a level incapable of detecting the defects.

According to the PRC Civil Code, where a defect of a product endangers the personal or property safety of another person, the manufacturer or the seller shall assume civil liabilities in accordance with the law.

Regulations Relating to Labor Protection, Social Insurance and Housing Provident Fund

Labor Protection

According to the PRC Labor Law, employers must develop and improve their rules and regulations in accordance with the law to ensure that workers enjoy their labor rights and perform their labor obligations. Employers must develop and improve the system of labor safety and sanitation and strictly implement the national protocols and procedures on labor safety. Employers must guard against labor safety accidents and reduce occupational hazards and labor safety and sanitation facilities must meet the relevant national standards. Employers must provide workers with the necessary labor protection equipment that meets the safety and hygiene conditions stipulated under national regulations by the State and conduct regular health checks for workers who engage in operations with occupational hazards. Laborers engaged in special operations must have received specialized training and obtained the pertinent qualifications.

According to PRC Labor Contract Law and the Implementation Regulations of the PRC Labor Contract Law of the PRC, employers and employees must enter into written labor contracts to establish their employment relationships. With respect to a circumstance where a labor relationship has already been established but no formal contract has been made, a written labor contracts must be entered into within one month from the date when the employee begins to work. In addition, wages shall not be lower than the local minimum wage standard.

According to Interim Provisions on Labor Dispatch, employers may employ dispatched workers only for temporary, auxiliary or substitutable positions and must strictly control the number of dispatched workers which may not exceed 10% of the total number of its workers.

Social Insurance and Housing Provident Fund

According to the PRC Social Insurance Law (the “Social Insurance Law”), the Interim Regulations on the Collection and Payment of Social Insurance Premiums, the Regulations on Work-Related Injury Insurance, the Regulations on Unemployment Insurance, the Trial Measures for Maternity Insurance of Enterprises Employees, and the Administrative Regulations on Housing Provident Fund, an enterprise established within the PRC shall pay a premium for basic pensions insurance, basic medical insurance, maternity insurance, work-related injury insurance and unemployment insurance, and contribute to the housing provident fund for its employees at a rate stipulated by the relevant authorities. Basic pension, medical and unemployment insurance contributions shall be paid by both employers and employees, while work-related injury insurance and maternity insurance contributions shall only be paid by employers. Employers who fail to promptly contribute social security premiums in full shall be ordered by the social security premium collection agency to make or supplement contributions within a prescribed time limit and shall be subject to a late payment fine computed from the due date at the rate of 0.05% per day; where payment is not made within prescribed time limit, the relevant administrative authorities shall impose a fine ranging from one to three times the outstanding amount.

According to the Administrative Regulations on Housing Provident Fund, employers must register with the competent managing center for housing provident funds and complete procedures for opening an account at a bank for the deposit of employees’ housing provident funds. Employers are also required to pay and deposit housing funds on behalf of their employees in full and in a timely manner. Employers that violate the Regulation on Housing Provident Fund and fail to open housing provident fund accounts for their employees with the housing fund administration center within a designated period or fail to go through the formalities of opening housing provident fund accounts for their employees shall be subject to fines.

Regulations on Foreign Investment

The PRC Foreign Investment Law and the Implementing Regulations for the PRC Foreign Investment Law, apply to any investment activities directly or indirectly conducted by a foreign natural person, enterprise or other organization and a foreign-invested enterprise established prior to the effective date of the Foreign Investment Law shall adjust its legal form or governance structure to comply with the provisions of the Company Law of the PRC or the Partnership Enterprises Law of the PRC, as applicable and complete amendment registration before January 1, 2025. According to the PRC Foreign Investment Law, the state applies the administrative system of pre-establishment national treatment plus negative list to foreign investment and accords national treatment to foreign investment outside of the negative list. Furthermore, the Implementing Regulations for the Foreign Investment Law provides implementing measures and detailed rules to ensure the effective implementation of the Foreign Investment Law.

On December 30, 2019, the Ministry of Commerce of the PRC (the “MOFCOM”) and the SAMR jointly promulgated the Measure for Reporting of Information on Foreign Investment, which came into effect on January 1, 2020 and pursuant to which, the establishment of the foreign-invested enterprises, including establishment through purchasing the equities of a domestic non-foreign-invested enterprise or subscribe to the increased capital of a domestic non-foreign funded enterprise and its subsequent changes are required to submit an initial or change report through a dedicated registration system.

Investment activities in the PRC by foreign investors are principally governed by the Special Administrative Measures (Negative List) for Foreign Investment Access (2024 Version) (the "Negative List 2024"). The Negative List 2024, which became effective on November 1, 2024, sets out the special administrative measures in respect of foreign investment access on a unified basis. The Negative List 2024 prohibits foreign investors from investing in certain specified sectors and requires them to meet investment conditions for certain other sectors. Sectors not covered in the Negative List 2024 shall be subject to administration under the principle of equal treatment for both domestic and foreign investments.

Regulations Relating to Overseas Investment

Pursuant to the Administrative Measures on Overseas Investments, the MOFCOM and its counterparts at provincial level are one of the regulatory bodies of overseas investment of PRC enterprises. According to these measures, overseas investment refers to the acquisition of ownership in an overseas non-financial enterprise by means of incorporation, merger, acquisition or any other method by an enterprise incorporated in the PRC. Any overseas investments involving sensitive countries, regions or industries shall be subject to the approval of the MOFCOM or its provincial counterparts. Overseas investments that do not fall into the aforementioned category shall be subject to filing with the relevant provincial counterparts of the MOFCOM.

Pursuant to the Administrative Measures for the Overseas Investment of Enterprises, an enterprise in the territory of the PRC (“the PRC Investor”) shall, in overseas investment, undergo the formalities for the confirmation or recordation, among others, of an overseas investment project (the “Investment Project”), report the relevant information and cooperate in supervisory inspection. Sensitive Investment Projects conducted by PRC Investors directly or through overseas enterprises controlled by them shall be subject to approval, and non-sensitive Investment Project directly conducted by PRC Investors, namely, non-sensitive Investment Projects involving PRC Investors’ direct contribution of assets or rights and interests or provision of financing or security, shall be subject to filing. The aforementioned sensitive Investment Project means an Investment Project involving a sensitive country or region or a sensitive industry. The NDRC promulgated the Catalogue of Sensitive Sectors for Overseas Investment (2018 Edition) to list the sensitive industries in detail.

Regulations Relating to Overseas Listing

The China Securities Regulatory Commission (the “CSRC”) promulgated the Trial Administrative Measures of Overseas Securities Offering and Listing by Domestic Companies in 2023, and issued several corresponding guidelines thereof (together, the “Overseas Listing Trial Measures”), requiring PRC companies’ overseas offerings and listings of equity securities be filed with the CSRC.

The Overseas Listing Trial Measures clarify the scope of overseas offerings and listings by PRC companies that are subject to the filing and reporting requirements thereunder. According to the Overseas Listing Trial Measures, if an issuer of securities meets both of the following criteria, the relevant offering and/or listing shall be considered as indirect overseas offering and/or listing of a PRC company: (i) 50% or more of the issuer's operating revenue, total profit, total assets or net assets, as documented in its audited consolidated financial statements for the most recent accounting year, is accounted for by PRC companies; and (ii) the primary business activities of the issuer are conducted in the PRC, or its main places of business are located in the PRC, or most members of the issuer’s management team are citizens or long-term residents of the PRC. The Overseas Listing Trial Measures further provide that the determination on whether an offering and/or listing constitutes an indirect offering and/or listing of a PRC company shall follow the principle of “substance over form,” making it possible for an offering and/or listing that does not meet the above criteria to still be considered an indirect overseas offering and/or listing of a PRC company, thus subject to the CSRC filing obligation.

The Overseas Listing Trial Measures further stipulate that PRC companies that have already directly or indirectly offered or listed securities in overseas markets shall fulfil their filing obligations and report relevant information to the CSRC within three working days after conducting a follow-on offering of equity securities on the same overseas market. They must also comply with relevant reporting requirements within three working days upon the occurrence of any specified circumstances. Failure to comply with the filing procedures may result in warnings and fines imposed by the CSRC or other competent PRC authorities.

Regulations Relating to PRC Taxation

Enterprise Income Tax

Pursuant to the PRC Enterprise Income Tax Law (the “EIT Law”) and its implementation rules, a PRC resident enterprise is subject to Enterprise Income Tax (“EIT”) at the current uniform rate of 25% commencing from January 1, 2008 unless reduced under certain specific qualifying criteria. The term “resident enterprise” refers to any enterprise established in the PRC and any enterprise established outside the PRC with a “place of effective management” within the PRC.

In 2018, we obtained a certificate from the Beijing government for a High and New Technology Enterprise (“HNTE”) qualification and the certificate was most recently renewed in 2022. This renewed certificate entitled the us to enjoy a preferential income tax rate of 15% for a period of three years from 2022 to 2025 if all the criteria for HNTE status could be satisfied in the relevant year.

Non-resident Enterprises Taxation Arrangement

Dividends (if any) paid by our subsidiaries in the PRC to their direct offshore parent companies are subject to PRC withholding income tax at the rate of 10%, provided that such dividends are not effectively connected with any establishment or place of the offshore parent company in the PRC. The 10% withholding income tax rate may be reduced or exempted pursuant to the provisions of any applicable tax treaties or tax arrangements. Hong Kong has a tax arrangement with mainland PRC that provides for a 5% withholding tax on dividends upon meeting certain conditions and requirements, including, among others, that the Hong Kong resident enterprise directly owns at least 25% equity interests of the PRC enterprise and is a “beneficial owner” of the dividends. Under the EIT Law and its implementation rules, gains derived by non-resident enterprises from the sale of equity interests in a PRC resident enterprise are subject to PRC withholding income tax at the rate of 10%. The 10% withholding income tax rate may be reduced or exempted pursuant to applicable tax treaties or tax arrangements. The gains are computed based on the difference between the sales proceeds and the basis price of the original investment. Stamp duty is also payable upon a direct transfer of equity interest in a PRC resident enterprise. The stamp duty is calculated at 0.05% on the transfer value, payable by each of the transferor and transferee.

The Announcement of the State Taxation Administration on Issues Relating to Withholding at Source of Income Tax of Non-resident Enterprises (“Circular 37”) purports to clarify certain issues in the implementation of the above regime, by providing, among others, the definitions of equity transfer income and tax basis, the foreign exchange rate to be used in the calculation of withholding amounts and the date of occurrence of the withholding obligation. Specifically, Circular 37 provides that where the transfer income subject to withholding at its source is derived by a non-PRC resident enterprise by way of installments, the installments may first be treated as recovery of costs of previous investments; upon recovery of all costs, the tax amount to be withheld shall then be computed and withheld.

Value-added Tax (“VAT”)

According to the Interim Regulations on VAT of the PRC and its implementation rules, unless otherwise specified by relevant laws and regulations, any enterprise or individual engaged in the sale of goods, provision of processing, repair and replacement services, sales of service, intangible assets and real estate and the importation of goods in the PRC are generally required to pay VAT.

According to the Circular of the Ministry of Finance and the State Taxation Administration on Adjustment to Value-Added Tax Rates (“Circular 32”) for VAT taxable sales acts or importation of goods originally subject to VAT rates of 17% and 11%, respectively, such tax rate shall be adjusted to 16% and 10%, respectively. For exported goods originally subject to a tax rate of 17% and an export tax refund rate of 17%, the export tax refund rate shall be adjusted to 16%. For exported goods and cross-border taxable acts originally subject to a tax rate of 11% and an export tax refund rate of 11%, the export tax refund rate shall be adjusted to 10%. Circular 32 became effective on May 1, 2018 and supersedes existing provisions which are inconsistent with Circular 32.

Pursuant to the Announcement on Policies for Deepening the VAT Reform (“Circular 39”) for VAT taxable sales acts or importation of goods originally subject to VAT rates of 16% and 10%, respectively, such tax rate shall be adjusted to 13% and 9%, respectively. For exported goods originally subject to a tax rate of 16% and an export tax refund rate of 16%, the export tax refund rate shall be adjusted to 13%. For exported goods and cross-border taxable acts originally subject to a tax rate of 10% and an export tax refund rate of 10%, the export tax refund rate shall be adjusted to 9%. Circular 39 became effective on April 1, 2019 and supersedes existing provisions which are inconsistent with Circular 39. According to the Circular on the Value-added Tax Policies for Rare Disease Drugs, for the production and sale of drugs for rare diseases, VAT shall be calculated and paid at the rate of 3% under the simplified method.

Regulations Relating to Foreign Exchange

The Regulations on Foreign Exchange Administration of the PRC apply to the receipt and payment of foreign currency or foreign exchange business activities conducted by PRC organizations and individuals or conducted by foreign organizations and individuals within the territory of the PRC. Renminbi is freely convertible for payments of current account items such as trade and service-related foreign exchange transactions and dividend payments, but is not freely convertible for capital expenditure items such as direct investments, loans or investments in securities outside of the PRC unless approval from the SAFE or its local counterpart is obtained in advance.

According to the Administrative Regulation regarding Foreign Exchange Settlement, Sales and Payment, foreign exchange receipts under the current account of foreign-invested enterprises may be retained to the fullest extent specified by the SAFE or its local counterparts. Any portion in excess of such amount shall be sold to a designated foreign exchange bank or through a foreign exchange swap center.

According to the Circular on Further Simplifying and Improving Policies on Foreign Exchange Administration for Direct Investment, banks shall directly examine and handle foreign exchange registration under overseas direct investment. The State Administration of Foreign Exchange and its branches shall indirectly regulate the foreign exchange registration of direct investment through banks.

According to the Circular on Reforming and Regulating Policies on the Control over Foreign Exchange Settlement of Capital Accounts, foreign currency earnings in capital accounts that maintain relevant policies of willingness to exchange settlement and have been clearly implemented on (including the recalling of raised capital by overseas listing) may undertake foreign exchange settlement in the banks according to actual business needs of the domestic institutions. The tentative percentage of foreign exchange settlement for foreign currency earnings in capital account of domestic institutions is 100%, subject to adjust of the SAFE in due time in accordance with international revenue and expenditure situations.

The Circular of the State Administration of Foreign Exchange on Issues Relating to Foreign Exchange Administration for Overseas Investment and Round-trip Investment by Chinese Residents through Special Purpose Vehicles requires PRC residents to register their legally owned assets or equity interests in domestic enterprises or offshore assets or interests with local branches of SAFE in connection with their direct establishment or indirect control of an offshore entity, for the purpose of overseas investment and financing.

The SAFE issued the Circular on Issues Concerning the Foreign Exchange Administration for Domestic Individuals Participating in Stock Incentive Plans of Overseas Listed Companies (the "Stock Option Rules"), which prescribed that PRC citizens or non-PRC citizens residing in the PRC for a continuous period of no less than one year (except for foreign diplomatic personnel in the PRC and representatives of international organizations in the PRC) who participate in any stock incentive plan of an overseas listed company shall, through itself (if its securities are listed overseas) or a domestic company which is affiliated with the overseas listed company (the “PRC Entity”), collectively entrust a domestic agency (the agency can be the PRC Entity or a qualified PRC organization as appointed by the PRC Entity) to handle foreign exchange registration and entrust an overseas institution to handle issues such as the exercise of options, the purchase and sale of corresponding stocks or equity and transfer of corresponding funds. In addition, the domestic agency is required to amend the SAFE registration with respect to the stock incentive plan if there is any material change to the stock incentive plan.

Failure to comply with the abovementioned foreign exchange regulations and requirements may result in warnings, fines, confiscation of illegal gains and even criminal liabilities.

Regulations Relating to Dividend Distribution

The principal laws, rules and regulations governing dividend distributions by foreign-invested enterprises in the PRC are the PRC Company Law and the PRC Foreign Investment Law and its Implementation Regulations. Under these requirements, foreign-invested enterprises may only pay dividends out of their accumulated profits, if any, as determined in accordance with PRC accounting standards and regulations. A PRC company is required to set aside at least 10% of its after-tax profits each year, after making up previous years’ accumulated losses, if any, as such company’s mandatory capital reserve funds until the aggregate amount of these reserve funds have reached 50% of its registered capital.

The EIT Law and its implementation rules provide that since January 1, 2008, a withholding income tax rate of 10% will be applicable to dividends declared to non-PRC resident enterprises, unless otherwise reduced according to treaties or arrangements between the PRC central government and the governments of other countries or regions where the non-PRC resident enterprises are incorporated.

Hong Kong has a tax arrangement with mainland China that provides for a 5% withholding tax on dividends distributed to a Hong Kong resident enterprise, upon meeting certain conditions and requirements, including, among others, that the Hong Kong resident enterprise directly owns at least 25% equity interests of the Chinese enterprise and is a “beneficial owner” of the dividends.

PRC Taxation

Under Article 2 of the EIT Law, a resident enterprise is an enterprise that is established in the PRC under the PRC laws, or an enterprise that is established under the laws of foreign countries (regions) but whose place of effective management is located in the PRC. We are a PRC resident enterprise for PRC tax purposes because we are a legal entity registered in Beijing, PRC.

Because we are a PRC resident enterprise for PRC Enterprise Income Tax purposes, dividends (if any) paid by us to our direct offshore institutional shareholders which are not PRC resident enterprises for PRC tax purposes are subject to PRC withholding income tax at the rate of 10%, provided that such dividends are not effectively connected with any establishment or place in the PRC of such offshore shareholders. In addition, gains derived by non-resident enterprises from the sale of equity interests in a PRC resident enterprise are subject to PRC withholding income tax at the rate of 10%. The 10% withholding income tax rate may be reduced or exempted pursuant to the provisions of any applicable tax treaties or tax arrangements. See the section entitled “Risk Factors—Risks Related to Our Business Operations in the PRC—Since Gyre Pharmaceuticals is a legal entity registered in Beijing, PRC, it is classified as a PRC tax resident for PRC income tax purposes by default, and such classification results in unfavorable tax consequences to Gyre Pharmaceuticals and its non-PRC shareholders.”

With respect to gains realized from the sale or other disposition of the shares, there is a possibility that a PRC tax authority may impose an income tax under the indirect transfer rules set out under the Announcement of the State Administration of Taxation on Several Issues Concerning the Enterprise Income Tax on Indirect Property Transfer by Non-Resident Enterprises, or SAT Circular 7, except that such transaction could fall under the safe harbor thereunder. See the section entitled “Risk Factors—Risks Related to Our Business Operations in the PRC—Gyre Pharmaceuticals and its shareholders face uncertainties with respect to indirect transfers of equity interests in PRC resident enterprises or other assets attributed to a PRC establishment of a non-PRC company, or other assets attributable to a PRC establishment of a non-PRC company. Enhanced scrutiny over acquisition transactions by the PRC tax authorities may have a negative impact on potential offshore restructuring transactions or sales of the shares of Gyre Pharmaceuticals’ offshore holding companies or investments where PRC taxable assets are involved.”

Government Regulation Outside of the United States and PRC

In addition to regulations in the United States, we will be subject to a variety of regulations in other jurisdictions governing, among other things, clinical trials and any commercial sales and distribution of our products. Whether or not we obtain FDA approval of a product, we must obtain the requisite approvals from regulatory authorities in foreign countries prior to the commencement of clinical trials or marketing of the product in those countries. Certain countries outside of the United States have a similar process that requires the submission of a clinical trial application much like the IND prior to the commencement of human clinical trials. In the EU, for example, a clinical trial application must be submitted to each country’s national health authority and an independent ethics committee, much like the FDA and IRB, respectively. Once the clinical trial application is approved in accordance with a country’s requirements, clinical trial development may proceed. Because biologically sourced raw materials are subject to unique contamination risks, their use may be restricted in some countries.

The requirements and process governing the conduct of clinical trials, product licensing, pricing and reimbursement vary from country to country. In all cases, the clinical trials are conducted in accordance with GCP and the applicable regulatory requirements and the ethical principles that have their origin in the Declaration of Helsinki.

To obtain regulatory approval of an investigational drug under EU regulatory systems, we must submit a marketing authorization application.

For other countries outside of the EU, such as countries in Eastern Europe, Latin America or Asia, the requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary from country to country. In all cases, again, the clinical trials are conducted in accordance with GCP and the applicable regulatory requirements and the ethical principles that have their origin in the Declaration of Helsinki.

If we or our potential collaborators fail to comply with applicable foreign regulatory requirements, we may be subject to, among other things, fines, suspension or withdrawal of regulatory approvals, product recalls, seizure of products, operating restrictions and criminal prosecution.